Merge bleeding edge up to 8774 into the GC branch.

test/mjsunit/debug-backtrace.js

Index: test/mjsunit/debug-backtrace.js
===================================================================
--- test/mjsunit/debug-backtrace.js	(revision 8778)
+++ test/mjsunit/debug-backtrace.js	(working copy)
@@ -195,7 +195,7 @@
       assertEquals("m", response.lookup(frame.func.ref).inferredName);
       assertFalse(frame.constructCall);
       assertEquals(35, frame.line);
-      assertEquals(2, frame.column);
+      assertEquals(6, frame.column);
       assertEquals(0, frame.arguments.length);
 
       json = '{"seq":0,"type":"request","command":"frame","arguments":{"number":3}}'
@@ -269,4 +269,3 @@
 // Make sure that the debug event listener vas invoked.
 assertFalse(exception, "exception in listener");
 assertTrue(listenerCalled);
-