Prepare push to trunk. Now working on version 3.18.4.

R=yangguo@chromium.org

Review URL: https://chromiumcodereview.appspot.com/14139031

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14403 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

ChangeLog

+2013-04-24: Version 3.18.3
+
+        Exposed the GC under a name that is less collision prone than window.gc.
+        (issue 2641)
+
+        Do not emit double values at their use sites. (Chromium issue 234101)
+
+        Added methods to allow resuming execution after calling
+        TerminateExecution(). (issue 2361)
+
+        Performance and stability improvements on all platforms.
+
+
 2013-04-22: Version 3.18.2
 
         OS::MemMove/OS::MemCopy: Don't call through to generated code when size

src/version.cc

@@ -34,7 +34,7 @@
 // system so their names cannot be changed without changing the scripts.
 #define MAJOR_VERSION     3
 #define MINOR_VERSION     18
-#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.)