Kill RendererCrashTest.

BUG=107226
TEST=none

Review URL: https://codereview.chromium.org/68513004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234768 0039d316-1c4b-4281-b951-d872f2087c98
Fix crash when shortcut destroys the target that the modifier up event is sent.

BUG=317831
TEST=new test case

Review URL: https://codereview.chromium.org/68743003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234769 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 234769