Distinguish plugin disconnections from plugin crashes.

chrome/browser/plugins/plugin_observer.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 CHROME_BROWSER_PLUGINS_PLUGIN_OBSERVER_H_
 #define CHROME_BROWSER_PLUGINS_PLUGIN_OBSERVER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "content/public/browser/web_contents_observer.h"
@@ skipping 16 matching lines @@
 namespace content {
 class WebContents;
 }
 
 class PluginObserver : public content::WebContentsObserver,
                        public content::WebContentsUserData<PluginObserver> {
  public:
   virtual ~PluginObserver();
 
   // content::WebContentsObserver implementation.
-  virtual void PluginCrashed(const FilePath& plugin_path) OVERRIDE;
+  virtual void PluginCrashed(const FilePath& plugin_path,
+                             base::ProcessId plugin_pid) OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
  private:
   explicit PluginObserver(content::WebContents* web_contents);
   friend class content::WebContentsUserData<PluginObserver>;
 
   class PluginPlaceholderHost;
 
 #if defined(ENABLE_PLUGIN_INSTALLATION)
   void InstallMissingPlugin(PluginInstaller* installer,
@@ skipping 18 matching lines @@
 
 #if defined(ENABLE_PLUGIN_INSTALLATION)
   // Stores all PluginPlaceholderHosts, keyed by their routing ID.
   std::map<int, PluginPlaceholderHost*> plugin_placeholders_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(PluginObserver);
 };
 
 #endif  // CHROME_BROWSER_PLUGINS_PLUGIN_OBSERVER_H_