Ignore DevTools messages from the old inspected RVH after navigation

content/renderer/devtools/devtools_agent.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_DEVTOOLS_DEVTOOLS_AGENT_H_
 #define CONTENT_RENDERER_DEVTOOLS_DEVTOOLS_AGENT_H_
 
 #include <string>
 #include <vector>
 
 #include "base/atomicops.h"
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "content/public/common/console_message_level.h"
-#include "content/public/renderer/render_view_observer.h"
+#include "content/public/renderer/render_frame_observer.h"
 #include "third_party/WebKit/public/web/WebDevToolsAgentClient.h"
 
 namespace blink {
 class WebDevToolsAgent;
 }
 
 struct GpuTaskInfo;
 
 namespace content {
-class RenderViewImpl;
 
 // DevToolsAgent belongs to the inspectable RenderView and provides Glue's
 // agents with the communication capabilities. All messages from/to Glue's
 // agents infrastructure are flowing through this communication agent.
 // There is a corresponding DevToolsClient object on the client side.
-class DevToolsAgent : public RenderViewObserver,
+class DevToolsAgent : public RenderFrameObserver,
                       public base::SupportsWeakPtr<DevToolsAgent>,
                       public blink::WebDevToolsAgentClient {
  public:
-  explicit DevToolsAgent(RenderViewImpl* render_view);
+  explicit DevToolsAgent(RenderFrame* main_render_frame);
   ~DevToolsAgent() override;
 
   // Returns agent instance for its routing id.
   static DevToolsAgent* FromRoutingId(int routing_id);
 
   blink::WebDevToolsAgent* GetWebAgent();
 
   bool IsAttached();
 
  private:
@@ skipping 49 matching lines @@
       int num_args,
       const char* const arg_names[],
       const unsigned char arg_types[],
       const unsigned long long arg_values[],
       unsigned char flags);
 
   bool is_attached_;
   bool is_devtools_client_;
   int32 gpu_route_id_;
   bool paused_in_mouse_move_;
+  RenderFrame* main_render_frame_;
 
   static base::subtle::AtomicWord /* TraceEventCallback */ event_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(DevToolsAgent);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_DEVTOOLS_DEVTOOLS_AGENT_H_