Merged r17800, r17801 into 3.21 branch.

Limit the size for typed arrays to MaxSmi.

Limit size of dehoistable array indices

BUG=319722,chromium:319835,chromium:319860
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/80653002

git-svn-id: https://v8.googlecode.com/svn/branches/3.21@17958 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merged r17432, r17526, r17545, r17620, r17747 into 3.21 branch.

Do not remove HAdd with zero if the other operand is a double.

Age ICs on context dispose notification.

Fix y-umlaut to uppercase.

Fix duplicate check in DependentCode::Insert.

BUG=309723,v8:2984,318454
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/80953002

git-svn-id: https://v8.googlecode.com/svn/branches/3.21@17971 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix previous backmerge (3.21.18.10 / r17958)

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/80753004

git-svn-id: https://v8.googlecode.com/svn/branches/3.21@17974 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merged r17599 into 3.21 branch.

Do not add values to HGraph in Lithium.

BUG=298269
R=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/82553010

git-svn-id: https://v8.googlecode.com/svn/branches/3.21@18019 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/3.21' into 3.21