Revert 184502
Revert 184502

Please don't use NOTRY=true with code changes.
Caused problems on the Android bots.

[ RUN      ] GlueSerializeTest.BackwardsCompatibleTest
../../webkit/glue/glue_serialize_unittest.cc:118: Failure
Value of: b.scrollOffset()
  Actual: 21,-21
Expected: a.scrollOffset()
Which is: 42,-42
../../webkit/glue/glue_serialize_unittest.cc:123: Failure
Value of: b.pageScaleFactor()
  Actual: 1
Expected: a.pageScaleFactor()
Which is: 2
[  FAILED  ] GlueSerializeTest.BackwardsCompatibleTest (2 ms)

> Backwards compatibility with HistoryItems with old page scale.
> 
> Given the semantic change in page scale, users upgrading from M18 would
> find their existing tabs all zoomed in at a weird scroll offset.  Add
> some more backwards compatibility cruft to compensate.
> 
> NOTRY=true
> BUG=175807
> 
> 
> Review URL: https://chromiumcodereview.appspot.com/12297020

TBR=aelias@chromium.org
Review URL: https://codereview.chromium.org/12328096

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@184524 0039d316-1c4b-4281-b951-d872f2087c98

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