[Isolates] Merge 6500:6700 from bleeding_edge to isolates.

ChangeLog

+2011-02-07: Version 3.1.2
+
+        Added better security checks when accessing properties via
+        Object.getOwnPropertyDescriptor.
+
+        Fixed bug in Object.defineProperty and related access bugs (issues
+        992, 1083 and 1092).
+
+        Added LICENSE.v8, LICENSE.strongtalk and LICENSE.valgrind to ease
+        copyright notice generation for embedders.
+
+
+2011-02-02: Version 3.1.1
+
+        Perform security checks before fetching the value in
+        Object.getOwnPropertyDescriptor.
+
+        Fixed a bug in Array.prototype.splice triggered by passing no
+        arguments.
+
+        Fixed bugs in -0 in arithmetic and in Math.pow.
+
+        Fixed bugs in the register allocator and in switching from optimized
+        to unoptimized code.
+
+
+2011-01-31: Version 3.1.0
+
+        Performance improvements on all platforms.
+
+
+2011-01-28: Version 3.0.12
+
+        Added support for strict mode parameter and object property
+        validation.
+
+        Fixed a couple of crash bugs.
+
+
 2011-01-25: Version 3.0.11
 
         Fixed a bug in deletion of lookup slots that could cause global
         variables to be accidentally deleted (http://crbug.com/70066).
 
         Added support for strict mode octal literal verification.
 
         Fixed a couple of crash bugs (issues 1070 and 1071).
 
 
@@ skipping 2406 matching lines @@
 
         Improved debugger support by allowing nested break points and by
         dealing with stack-overflows when compiling functions before
         setting break points in them.
 
 
 2008-07-03: Version 0.1.0
 
         Initial export.