MIPS: Introduce intrinsic to expose debug state to generated code.

Port r21908 (527abba)

BUG=
R=plind44@gmail.com

Review URL: https://codereview.chromium.org/343193005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21946 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix #include order in snapshot-external.cc

This corrects a linter complaint.

BUG=
R=mstarzinger@chromium.org, vogelheim@chromium.org

Review URL: https://codereview.chromium.org/351643002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21947 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
MIPS: Fix comment in r21905: "Support LiveEdit."

BUG=
R=plind44@gmail.com

Review URL: https://codereview.chromium.org/345243005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21948 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
ARM: Clean up FlushICache.

In theory, the Thumb version of FlushICache doesn't have to be any
different from the ARM version: There is no need to switch to ARM mode
for the svc, and r7 can be used just like any other register.

In practice, GCC uses r7 as a frame pointer in Thumb code, and it
refuses to allow it be used in inline assembly. To avoid complicated
checks to determine whether or not it is possible to use it directly,
the FlushICache function explicitly preserves r7.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/335133002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21949 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Map/Set: Implement constructor parameter handling

When an iterable object is passed in as the argument to the Map and Set
constructor the elements of the iterable object are used to populate the
Map and Set.

http://people.mozilla.org/~jorendorff/es6-draft.html#sec-map-iterable
http://people.mozilla.org/~jorendorff/es6-draft.html#sec-set-iterable

BUG=v8:3398
LOG=Y
R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/345613003

Patch from Erik Arvidsson <arv@chromium.org>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21950 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/master'