Remove some suppressions which are no longer needed. BitmapPlatformDeviceData was removed in r238213, and I believe the underlying problem was fixed in r238610.

R=jyasskin
BUG=110783

Review URL: https://codereview.chromium.org/104823002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238721 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238721