Fix some problems with TaskManagerBrowserTest.PopulateWebCacheFields:

chrome/browser/task_manager_resource_providers.h

 // Copyright (c) 2006-2008 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_TASK_MANAGER_RESOURCE_PROVIDERS_H_
 #define CHROME_BROWSER_TASK_MANAGER_RESOURCE_PROVIDERS_H_
 #pragma once
 
 #include <map>
 #include <vector>
@@ skipping 17 matching lines @@
  public:
   explicit TaskManagerTabContentsResource(TabContents* tab_contents);
   ~TaskManagerTabContentsResource();
 
   // TaskManagerResource methods:
   std::wstring GetTitle() const;
   SkBitmap GetIcon() const;
   base::ProcessHandle GetProcess() const;
   TabContents* GetTabContents() const;
 
-  virtual bool ReportsCacheStats() const { return true; }
+  virtual bool HasCacheStats() const { return had_stats_update_; }
   virtual WebKit::WebCache::ResourceTypeStats GetWebCoreCacheStats() const;
 
   virtual bool ReportsV8MemoryStats() const { return true; }
   virtual size_t GetV8MemoryAllocated() const;
   virtual size_t GetV8MemoryUsed() const;
 
   // TabContents always provide the network usage.
   bool SupportNetworkUsage() const { return true; }
   void SetSupportNetworkUsage() { }
 
   virtual void Refresh();
 
   virtual void NotifyResourceTypeStats(
       const WebKit::WebCache::ResourceTypeStats& stats);
 
   virtual void NotifyV8HeapStats(size_t v8_memory_allocated,
                                  size_t v8_memory_used);
 
  private:
   TabContents* tab_contents_;
   base::ProcessHandle process_;
   int pid_;
+
   // The stats_ field holds information about resource usage in the renderer
   // process and so it is updated asynchronously by the Refresh() call.
   WebKit::WebCache::ResourceTypeStats stats_;
+
   // This flag is true if we are waiting for the renderer to report its stats.
   bool pending_stats_update_;
 
+  // This flag is true after we received at least one stats report
+  // from the renderer.
+  bool had_stats_update_;
+
   // We do a similar dance to gather the V8 memory usage in a process.
   size_t v8_memory_allocated_;
   size_t v8_memory_used_;
   bool pending_v8_memory_allocated_update_;
 
   DISALLOW_COPY_AND_ASSIGN(TaskManagerTabContentsResource);
 };
 
 class TaskManagerTabContentsResourceProvider
     : public TaskManager::ResourceProvider,
@@ skipping 310 matching lines @@
 
   void AddToTaskManager(ChildProcessInfo child_process_info);
 
   TaskManager* task_manager_;
   TaskManagerBrowserProcessResource resource_;
 
   DISALLOW_COPY_AND_ASSIGN(TaskManagerBrowserProcessResourceProvider);
 };
 
 #endif  // CHROME_BROWSER_TASK_MANAGER_RESOURCE_PROVIDERS_H_