[DevTools] Notify embedder about pausing/resuming in debugger.

public/web/WebDevToolsAgentClient.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 42 matching lines @@
     // if the same client is reattached to another agent.
     virtual void saveAgentRuntimeState(const WebString&) { }
 
     class WebKitClientMessageLoop {
     public:
         virtual ~WebKitClientMessageLoop() { }
         virtual void run() = 0;
         virtual void quitNow() = 0;
     };
     virtual WebKitClientMessageLoop* createClientMessageLoop() { return 0; }
+    virtual void willEnterDebugLoop() { }
+    virtual void didExitDebugLoop() { }
 
     class AllocatedObjectVisitor {
     public:
         virtual bool visitObject(const void* ptr) = 0;
     protected:
         virtual ~AllocatedObjectVisitor() { }
     };
     virtual void visitAllocatedObjects(AllocatedObjectVisitor*) { }
 
     class InstrumentedObjectSizeProvider {
@@ skipping 24 matching lines @@
 
     virtual void setTouchEventEmulationEnabled(bool enabled, bool allowPinch) { }
 
 protected:
     ~WebDevToolsAgentClient() { }
 };
 
 } // namespace blink
 
 #endif