Set a longer timeout for NaClPPAPITest.PostMessage_SendingArrayBuffer. It's timing out on XP bots because now the timeout on the PPAPI tests is the default 45s for all browser_tests. On my fast machine this takes 20s, so it's no surprise that it sometimes flakes on XP vm's if the limit is 45s.
Set a longer timeout for NaClPPAPITest.PostMessage_SendingArrayBuffer. It's timing out on XP bots because now the timeout on the PPAPI tests is the default 45s for all browser_tests. On my fast machine this takes 20s, so it's no surprise that it sometimes flakes on XP vm's if the limit is 45s.

TBR=brettw
Review URL: https://chromiumcodereview.appspot.com/9662040

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@126060 0039d316-1c4b-4281-b951-d872f2087c98

ropik/chromium,yitian134/chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,adobe/chromium,ropik/chromium,adobe/chromium,ropik/chromium,adobe/chromium,ropik/chromium,yitian134/chromium,adobe/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,yitian134/chromium,gavinp/chromium,yitian134/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,ropik/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,gavinp/chromium,gavinp/chromium,gavinp/chromium,adobe/chromium,gavinp/chromium,ropik/chromium,adobe/chromium,yitian134/chromium