Merged r19804, r19890, r19894, r19935 into 3.24 branch.

fix bad access check check

Check that constant is an integer before getting its value in HGraphBuilder::MatchRotateRight.

Simplify GetEnumPropertyKeys and avoid trimming fixed arrays in large object space.

Fix generalization with callbacks.

BUG=351263,352070,352588
LOG=N
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/222213004

git-svn-id: https://v8.googlecode.com/svn/branches/3.24@20441 ce2b1a6d-e550-0410-aec6-3dcde31c8c00