Upgrade to V8 3.6

Merge V8 at 3.6.6.11

Simple merge required updates to makefiles only.

Bug: 5688872
Change-Id: Ib38b7ffbcd409585f6cb6fccc59c767029cecc77
diff --git a/src/debug.h b/src/debug.h
index c614844..a098040 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -247,6 +247,8 @@
   static Handle<DebugInfo> GetDebugInfo(Handle<SharedFunctionInfo> shared);
   static bool HasDebugInfo(Handle<SharedFunctionInfo> shared);
 
+  void PrepareForBreakPoints();
+
   // Returns whether the operation succeeded.
   bool EnsureDebugInfo(Handle<SharedFunctionInfo> shared);
 
@@ -506,6 +508,9 @@
     // Frame pointer from last step next action.
     Address last_fp_;
 
+    // Number of queued steps left to perform before debug event.
+    int queued_step_count_;
+
     // Frame pointer for frame from which step in was performed.
     Address step_into_fp_;
 
@@ -1026,6 +1031,7 @@
         return NULL;
     }
   }
+
  private:
   Debug::AddressId id_;
 };