Prepare push to trunk. Now working on version 3.9.21.

R=jkummerow@chromium.org
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9716030

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11078 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

ChangeLog

+2012-03-19: Version 3.9.20
+
+        Fixed declarations escaping global strict eval. (Issue 1624)
+
+        Fixed wrapping of receiver for non-strict callbacks. (Issue 1973)
+
+        Fixed function declarations overwriting read-only global properties.
+        (Chromium issue 115452)
+
+        Fixed --use-strict flag in combination with --harmony[-scoping].
+
+        Debugger: naive implementation of "step into Function.prototype.bind".
+
+        Debugger: added ability to set script source from within OnBeforeCompile
+
+        Added flag to always call DebugBreak on abort.
+
+        Re-enabled constructor inlining and inline === comparison with boolean
+        constants. (Issue 2009)
+
+        Don't use an explicit s0 in ClampDoubleToUint8. (Issue 2004)
+
+        Performance and stability improvements on all platforms.
+
+
 2012-03-14: Version 3.9.19
 
         Ensure there is a smi check of the receiver for global load and call

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      20
+#define BUILD_NUMBER      21
 #define PATCH_LEVEL       0
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)