Add a gfx::::LoadDefaults Heapcheck:Leak suppression
Add a gfx::::LoadDefaults Heapcheck:Leak suppression

Surfaced by ChromeToMobileServiceTest.RequirementsToEnable; see logs:
http://build.chromium.org/p/chromium.memory.fyi/builders/Chromium%20OS%20Heapcheck/builds/13337/

I added a generalized LoadDefaults suppression under the test; full stack:
Suppression (error hash=#028FDA4EF95DBAC8#):
{
<insert_a_suppression_name_here>
Heapcheck:Leak
fun:??
fun:gfx::::LoadDefaults
fun:gfx::GetDefaultWebKitFontRenderParams
fun:renderer_preferences_util::UpdateFromSystemSettings
fun:PrefsTabHelper::PrefsTabHelper
fun:content::WebContentsUserData::CreateForWebContents
fun:TabContents::TabContents
fun:TabContents::Factory::CreateTabContents
fun:BrowserTabstripTabContentsCreator::CreateTabContents
fun:chrome::TabContentsFactory
fun:chrome::Navigate
fun:BrowserWithTestWindowTest::AddTab
fun:::ChromeToMobileServiceTest_RequirementsToEnable_Test::TestBody
}

BUG=132431,157750,122183
TEST=No linux_chromeos unit_test failures
R=hbono@chromium.org

Review URL: https://codereview.chromium.org/11363029

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@165313 0039d316-1c4b-4281-b951-d872f2087c98

hgl888/chromium-crosswalk,ChromiumWebApps/chromium,Jonekee/chromium.src,nacl-webkit/chrome_deps,jaruba/chromium.src,Chilledheart/chromium,ltilve/chromium,Pluto-tv/chromium-crosswalk,krieger-od/nwjs_chromium.src,Chilledheart/chromium,nacl-webkit/chrome_deps,bright-sparks/chromium-spacewalk,Pluto-tv/chromium-crosswalk,bright-sparks/chromium-spacewalk,hujiajie/pa-chromium,nacl-webkit/chrome_deps,mohamed--abdel-maksoud/chromium.src,jaruba/chromium.src,mohamed--abdel-maksoud/chromium.src,TheTypoMaster/chromium-crosswalk,Jonekee/chromium.src,Fireblend/chromium-crosswalk,hgl888/chromium-crosswalk-efl,axinging/chromium-crosswalk,M4sse/chromium.src,mogoweb/chromium-crosswalk,axinging/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,pozdnyakov/chromium-crosswalk,littlstar/chromium.src,fujunwei/chromium-crosswalk,ltilve/chromium,krieger-od/nwjs_chromium.src,anirudhSK/chromium,zcbenz/cefode-chromium,chuan9/chromium-crosswalk,dushu1203/chromium.src,nacl-webkit/chrome_deps,Chilledheart/chromium,nacl-webkit/chrome_deps,ondra-novak/chromium.src,M4sse/chromium.src,patrickm/chromium.src,Jonekee/chromium.src,zcbenz/cefode-chromium,nacl-webkit/chrome_deps,Chilledheart/chromium,Pluto-tv/chromium-crosswalk,zcbenz/cefode-chromium,hujiajie/pa-chromium,ondra-novak/chromium.src,crosswalk-project/chromium-crosswalk-efl,mohamed--abdel-maksoud/chromium.src,ltilve/chromium,chuan9/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,mogoweb/chromium-crosswalk,zcbenz/cefode-chromium,markYoungH/chromium.src,bright-sparks/chromium-spacewalk,anirudhSK/chromium,anirudhSK/chromium,pozdnyakov/chromium-crosswalk,ondra-novak/chromium.src,Jonekee/chromium.src,axinging/chromium-crosswalk,Jonekee/chromium.src,crosswalk-project/chromium-crosswalk-efl,ChromiumWebApps/chromium,Just-D/chromium-1,anirudhSK/chromium,Just-D/chromium-1,fujunwei/chromium-crosswalk,bright-sparks/chromium-spacewalk,axinging/chromium-crosswalk,zcbenz/cefode-chromium,jaruba/chromium.src,ChromiumWebApps/chromium,Fireblend/chromium-crosswalk,hgl888/chromium-crosswalk,axinging/chromium-crosswalk,anirudhSK/chromium,hgl888/chromium-crosswalk-efl,timopulkkinen/BubbleFish,Just-D/chromium-1,mogoweb/chromium-crosswalk,nacl-webkit/chrome_deps,markYoungH/chromium.src,jaruba/chromium.src,patrickm/chromium.src,bright-sparks/chromium-spacewalk,fujunwei/chromium-crosswalk,markYoungH/chromium.src,anirudhSK/chromium,pozdnyakov/chromium-crosswalk,M4sse/chromium.src,markYoungH/chromium.src,ondra-novak/chromium.src,markYoungH/chromium.src,mohamed--abdel-maksoud/chromium.src,chuan9/chromium-crosswalk,dushu1203/chromium.src,timopulkkinen/BubbleFish,pozdnyakov/chromium-crosswalk,crosswalk-project/chromium-crosswalk-efl,patrickm/chromium.src,markYoungH/chromium.src,Just-D/chromium-1,patrickm/chromium.src,timopulkkinen/BubbleFish,TheTypoMaster/chromium-crosswalk,timopulkkinen/BubbleFish,jaruba/chromium.src,ondra-novak/chromium.src,zcbenz/cefode-chromium,ChromiumWebApps/chromium,axinging/chromium-crosswalk,mogoweb/chromium-crosswalk,dednal/chromium.src,hujiajie/pa-chromium,ChromiumWebApps/chromium,pozdnyakov/chromium-crosswalk,hgl888/chromium-crosswalk-efl,patrickm/chromium.src,ltilve/chromium,Fireblend/chromium-crosswalk,mogoweb/chromium-crosswalk,chuan9/chromium-crosswalk,mogoweb/chromium-crosswalk,chuan9/chromium-crosswalk,Fireblend/chromium-crosswalk,timopulkkinen/BubbleFish,Pluto-tv/chromium-crosswalk,Pluto-tv/chromium-crosswalk,Jonekee/chromium.src,littlstar/chromium.src,dushu1203/chromium.src,hujiajie/pa-chromium,fujunwei/chromium-crosswalk,krieger-od/nwjs_chromium.src,krieger-od/nwjs_chromium.src,TheTypoMaster/chromium-crosswalk,hgl888/chromium-crosswalk,anirudhSK/chromium,jaruba/chromium.src,pozdnyakov/chromium-crosswalk,Just-D/chromium-1,krieger-od/nwjs_chromium.src,TheTypoMaster/chromium-crosswalk,zcbenz/cefode-chromium,Pluto-tv/chromium-crosswalk,ChromiumWebApps/chromium,littlstar/chromium.src,Chilledheart/chromium,littlstar/chromium.src,axinging/chromium-crosswalk,ChromiumWebApps/chromium,ChromiumWebApps/chromium,ltilve/chromium,nacl-webkit/chrome_deps,zcbenz/cefode-chromium,dednal/chromium.src,bright-sparks/chromium-spacewalk,fujunwei/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,pozdnyakov/chromium-crosswalk,ltilve/chromium,mogoweb/chromium-crosswalk,Just-D/chromium-1,anirudhSK/chromium,markYoungH/chromium.src,ondra-novak/chromium.src,TheTypoMaster/chromium-crosswalk,ondra-novak/chromium.src,dednal/chromium.src,bright-sparks/chromium-spacewalk,patrickm/chromium.src,anirudhSK/chromium,PeterWangIntel/chromium-crosswalk,hgl888/chromium-crosswalk,dednal/chromium.src,hgl888/chromium-crosswalk,anirudhSK/chromium,markYoungH/chromium.src,ondra-novak/chromium.src,PeterWangIntel/chromium-crosswalk,krieger-od/nwjs_chromium.src,mohamed--abdel-maksoud/chromium.src,dednal/chromium.src,ChromiumWebApps/chromium,littlstar/chromium.src,dushu1203/chromium.src,mohamed--abdel-maksoud/chromium.src,TheTypoMaster/chromium-crosswalk,anirudhSK/chromium,mohamed--abdel-maksoud/chromium.src,dednal/chromium.src,PeterWangIntel/chromium-crosswalk,hgl888/chromium-crosswalk-efl,M4sse/chromium.src,Pluto-tv/chromium-crosswalk,dednal/chromium.src,Just-D/chromium-1,Pluto-tv/chromium-crosswalk,Jonekee/chromium.src,nacl-webkit/chrome_deps,crosswalk-project/chromium-crosswalk-efl,hgl888/chromium-crosswalk-efl,patrickm/chromium.src,axinging/chromium-crosswalk,Jonekee/chromium.src,hgl888/chromium-crosswalk-efl,hgl888/chromium-crosswalk-efl,hujiajie/pa-chromium,axinging/chromium-crosswalk,ChromiumWebApps/chromium,dushu1203/chromium.src,markYoungH/chromium.src,krieger-od/nwjs_chromium.src,mogoweb/chromium-crosswalk,hgl888/chromium-crosswalk-efl,Chilledheart/chromium,jaruba/chromium.src,M4sse/chromium.src,mohamed--abdel-maksoud/chromium.src,ChromiumWebApps/chromium,PeterWangIntel/chromium-crosswalk,mogoweb/chromium-crosswalk,hgl888/chromium-crosswalk-efl,nacl-webkit/chrome_deps,Chilledheart/chromium,patrickm/chromium.src,PeterWangIntel/chromium-crosswalk,Pluto-tv/chromium-crosswalk,dushu1203/chromium.src,littlstar/chromium.src,fujunwei/chromium-crosswalk,timopulkkinen/BubbleFish,fujunwei/chromium-crosswalk,littlstar/chromium.src,Fireblend/chromium-crosswalk,Chilledheart/chromium,patrickm/chromium.src,hgl888/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,M4sse/chromium.src,dushu1203/chromium.src,Fireblend/chromium-crosswalk,dednal/chromium.src,zcbenz/cefode-chromium,pozdnyakov/chromium-crosswalk,M4sse/chromium.src,PeterWangIntel/chromium-crosswalk,Fireblend/chromium-crosswalk,dushu1203/chromium.src,jaruba/chromium.src,jaruba/chromium.src,zcbenz/cefode-chromium,timopulkkinen/BubbleFish,nacl-webkit/chrome_deps,chuan9/chromium-crosswalk,ondra-novak/chromium.src,dushu1203/chromium.src,krieger-od/nwjs_chromium.src,pozdnyakov/chromium-crosswalk,markYoungH/chromium.src,Jonekee/chromium.src,crosswalk-project/chromium-crosswalk-efl,markYoungH/chromium.src,Fireblend/chromium-crosswalk,hujiajie/pa-chromium,PeterWangIntel/chromium-crosswalk,mogoweb/chromium-crosswalk,timopulkkinen/BubbleFish,ltilve/chromium,bright-sparks/chromium-spacewalk,M4sse/chromium.src,M4sse/chromium.src,hujiajie/pa-chromium,ChromiumWebApps/chromium,anirudhSK/chromium,timopulkkinen/BubbleFish,dednal/chromium.src,chuan9/chromium-crosswalk,hujiajie/pa-chromium,ltilve/chromium,PeterWangIntel/chromium-crosswalk,littlstar/chromium.src,Jonekee/chromium.src,M4sse/chromium.src,axinging/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,pozdnyakov/chromium-crosswalk,chuan9/chromium-crosswalk,timopulkkinen/BubbleFish,TheTypoMaster/chromium-crosswalk,ltilve/chromium,dednal/chromium.src,dednal/chromium.src,axinging/chromium-crosswalk,fujunwei/chromium-crosswalk,krieger-od/nwjs_chromium.src,pozdnyakov/chromium-crosswalk,timopulkkinen/BubbleFish,crosswalk-project/chromium-crosswalk-efl,hgl888/chromium-crosswalk,bright-sparks/chromium-spacewalk,hgl888/chromium-crosswalk-efl,fujunwei/chromium-crosswalk,Just-D/chromium-1,Jonekee/chromium.src,Chilledheart/chromium,Fireblend/chromium-crosswalk,jaruba/chromium.src,hujiajie/pa-chromium,krieger-od/nwjs_chromium.src,crosswalk-project/chromium-crosswalk-efl,crosswalk-project/chromium-crosswalk-efl,jaruba/chromium.src,hujiajie/pa-chromium,PeterWangIntel/chromium-crosswalk,chuan9/chromium-crosswalk,Just-D/chromium-1,hujiajie/pa-chromium,krieger-od/nwjs_chromium.src,dushu1203/chromium.src,dushu1203/chromium.src,M4sse/chromium.src,zcbenz/cefode-chromium,crosswalk-project/chromium-crosswalk-efl,hgl888/chromium-crosswalk,hgl888/chromium-crosswalk