Merge V8 at r8836: Pick up V8 3.2.10.34

Bug: 5095592
Change-Id: I955924aac6e0bdba591798526c33c4d59fd3dc4f
diff --git a/src/debug.h b/src/debug.h
index 9366fc3..6be33a6 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -809,7 +809,7 @@
   bool IsDebuggerActive();
 
  private:
-  Debugger();
+  explicit Debugger(Isolate* isolate);
 
   void CallEventCallback(v8::DebugEvent event,
                          Handle<Object> exec_state,