Prepare push to trunk. Now working on version 3.9.16.

R=yangguo@chromium.org
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9600042

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10929 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

ChangeLog

+2012-03-06: Version 3.9.15
+
+        Fix the heap profiler crash caused by memory layout changes between
+        passes.
+
+        Fix Error.prototype.toString to throw TypeError. (issue 1980)
+
+        Fix double-rounding in strtod for MinGW. (issue 1062)
+
+        Fix corrupted snapshot serializaton on ia32. (Chromium issue v8/1985)
+
+        Performance and stability improvements on all platforms.
+
+
 2012-03-01: Version 3.9.14
 
         Performance and stability improvements on all platforms.

src/version.cc

@@ -34,7 +34,7 @@
 // cannot be changed without changing the SCons build script.
 #define MAJOR_VERSION     3
 #define MINOR_VERSION     9
-#define BUILD_NUMBER      15
+#define BUILD_NUMBER      16
 #define PATCH_LEVEL       0
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)