Prepare push to trunk. Now working on version 3.12.4.

R=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10668019

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11917 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

ChangeLog

+2012-06-25: Version 3.12.3
+
+        Reverted r11835 'Unify promotion and allocation limit computation' due
+        to V8 Splay performance regression on Mac.  (Chromium issue 134183)
+
+        Fixed sharing of literal boilerplates for optimized code.  (issue 2193)
+
+        Performance and stability improvements on all platforms.
+
+
 2012-06-22: Version 3.12.2
 
         Made near-jump check more strict in LoadNamedFieldPolymorphic on

src/version.cc

@@ -34,7 +34,7 @@
 // cannot be changed without changing the SCons build script.
 #define MAJOR_VERSION     3
 #define MINOR_VERSION     12
-#define BUILD_NUMBER      3
+#define BUILD_NUMBER      4
 #define PATCH_LEVEL       0
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)