Test extension reloading behavior.

content/public/test/mock_render_process_host.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_PUBLIC_TEST_MOCK_RENDER_PROCESS_HOST_H_
 #define CONTENT_PUBLIC_TEST_MOCK_RENDER_PROCESS_HOST_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_vector.h"
 #include "content/public/browser/render_process_host.h"
@@ skipping 99 matching lines @@
   virtual ~MockRenderProcessHostFactory();
 
   virtual RenderProcessHost* CreateRenderProcessHost(
       BrowserContext* browser_context) const OVERRIDE;
 
   // Removes the given MockRenderProcessHost from the MockRenderProcessHost list
   // without deleting it. When a test deletes a MockRenderProcessHost, we need
   // to remove it from |processes_| to prevent it from being deleted twice.
   void Remove(MockRenderProcessHost* host) const;
 
+  class Observer {
+   public:
+    Observer(MockRenderProcessHostFactory* factory) : factory_(factory) {
+      factory->AddObserver(this);

[Paweł Hajdan Jr., 2013/04/04 21:30:05]

nit: Why this code doesn't move the implementation to the .cc file? (there is a
general rule about doing that).

[Jeffrey Yasskin, 2013/04/05 13:14:01]

Done.

+    }
+    virtual ~Observer();
+    virtual void OnRenderProcessHostCreated(MockRenderProcessHost*) {}
+    virtual void OnRenderProcessHostDestroyed(MockRenderProcessHost*) {}
+   private:
+    MockRenderProcessHostFactory* factory_;
+  };
+
+  void AddObserver(Observer* obs) {
+    observer_list_.AddObserver(obs);
+  }
+  void RemoveObserver(Observer* obs) {
+    observer_list_.RemoveObserver(obs);
+  }
+
  private:
   // A list of MockRenderProcessHosts created by this object. This list is used
   // for deleting all MockRenderProcessHosts that have not deleted by a test in
   // the destructor and prevent them from being leaked.
   mutable ScopedVector<MockRenderProcessHost> processes_;
 
+  mutable ObserverList<Observer> observer_list_;
+
   DISALLOW_COPY_AND_ASSIGN(MockRenderProcessHostFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_MOCK_RENDER_PROCESS_HOST_H_