Prepare push to trunk. Now working on version 3.15.7.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/11316166

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13057 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

ChangeLog

+2012-11-26: Version 3.15.6
+
+        Ensure double arrays are filled with holes when extended from
+        variations of empty arrays. (Chromium issue 162085)
+
+        Performance and stability improvements on all platforms.
+
+
 2012-11-23: Version 3.15.5
 
         Fixed JSON.stringify for objects with interceptor handlers.

src/version.cc

@@ -34,7 +34,7 @@
 // cannot be changed without changing the SCons build script.
 #define MAJOR_VERSION     3
 #define MINOR_VERSION     15
-#define BUILD_NUMBER      6
+#define BUILD_NUMBER      7
 #define PATCH_LEVEL       0
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)