Prepare push to trunk. Now working on version 3.9.23.

R=mstarzinger@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9748013

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11092 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

ChangeLog

+2012-03-20: Version 3.9.22
+
+        Enabled count-based profiler by default.
+
+        Implemented a hash based look-up to speed up address checks
+        in large object space (issue 853).
+
+        Performance and stability improvements on all platforms.
+
+
 2012-03-19: Version 3.9.21
 
         Fixed push-to-trunk script (and re-push).

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      22
+#define BUILD_NUMBER      23
 #define PATCH_LEVEL       0
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)