Fix task manager behavior for tabs that are killed/restarted.

chrome/browser/task_manager/web_contents_resource_provider.cc

 // Copyright 2014 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.
 
 #include "chrome/browser/task_manager/web_contents_resource_provider.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/prerender/prerender_manager.h"
@@ skipping 24 matching lines @@
                                  WebContentsResourceProvider* provider)
       : content::WebContentsObserver(web_contents), provider_(provider) {}
 
   // content::WebContentsObserver implementation.
   virtual void RenderViewHostChanged(RenderViewHost* old_host,
                                      RenderViewHost* new_host) OVERRIDE {
     provider_->RemoveFromTaskManager(web_contents());
     provider_->AddToTaskManager(web_contents());
   }
 
+  virtual void RenderViewReady() OVERRIDE {
+    provider_->RemoveFromTaskManager(web_contents());
+    provider_->AddToTaskManager(web_contents());
+  }
+
+  virtual void RenderProcessGone(base::TerminationStatus status) OVERRIDE {
+    provider_->RemoveFromTaskManager(web_contents());
+  }
+
   virtual void WebContentsDestroyed(WebContents* web_contents) OVERRIDE {
     provider_->RemoveFromTaskManager(web_contents);
     provider_->DeleteObserver(this);  // Deletes |this|.
   }
 
  private:
   WebContentsResourceProvider* provider_;
 };
 
 ////////////////////////////////////////////////////////////////////////////////
@@ skipping 122 matching lines @@
 void WebContentsResourceProvider::DeleteObserver(
     TaskManagerWebContentsObserver* observer) {
   if (!web_contents_observers_.erase(observer)) {
     NOTREACHED();
     return;
   }
   delete observer;  // Typically, this is our caller. Deletion is okay.
 }
 
 }  // namespace task_manager