Fixes bug in IconManager where it was possible for callback to be invoked with a deleted pointer. We never hit this as none of the callers use the SkBitmap supplied to the callback. I was tempted to nuke the SkBitmap from the callback, but seems useful.
Fixes bug in IconManager where it was possible for callback to be
invoked with a deleted pointer. We never hit this as none of the
callers use the SkBitmap supplied to the callback. I was tempted to
nuke the SkBitmap from the callback, but seems useful.

BUG=1372146
TEST=none

Review URL: http://codereview.chromium.org/2438

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@2081 0039d316-1c4b-4281-b951-d872f2087c98

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