Revert 62695 - Revert 62644 - During shutdown delete any pending tasks if running under Heapchecker.
Revert 62695 - Revert 62644 - During shutdown delete any pending tasks if running under Heapchecker.

BUG=50345
TEST=Suppression no longer gets used.
Original Review URL: http://codereview.chromium.org/3791006
Revert Review URL: http://codereview.chromium.org/3779008
Review URL: http://codereview.chromium.org/4111005

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@64125 0039d316-1c4b-4281-b951-d872f2087c98

gavinp/chromium,adobe/chromium,Crystalnix/house-of-life-chromium,Crystalnix/house-of-life-chromium,adobe/chromium,gavinp/chromium,adobe/chromium,Crystalnix/house-of-life-chromium,yitian134/chromium,yitian134/chromium,gavinp/chromium,ropik/chromium,gavinp/chromium,yitian134/chromium,gavinp/chromium,Crystalnix/house-of-life-chromium,adobe/chromium,adobe/chromium,adobe/chromium,Crystalnix/house-of-life-chromium,ropik/chromium,ropik/chromium,Crystalnix/house-of-life-chromium,ropik/chromium,ropik/chromium,gavinp/chromium,Crystalnix/house-of-life-chromium,gavinp/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,gavinp/chromium,yitian134/chromium,adobe/chromium,yitian134/chromium,ropik/chromium,adobe/chromium,Crystalnix/house-of-life-chromium,ropik/chromium,ropik/chromium,yitian134/chromium,gavinp/chromium,Crystalnix/house-of-life-chromium,yitian134/chromium,yitian134/chromium,Crystalnix/house-of-life-chromium,adobe/chromium,ropik/chromium,Crystalnix/house-of-life-chromium,yitian134/chromium,adobe/chromium