Highlight background pages in task manager if user clicks View Background Pages.

chrome/browser/ui/cocoa/task_manager_mac.h

 // Copyright (c) 2009 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_UI_COCOA_TASK_MANAGER_MAC_H_
 #define CHROME_BROWSER_UI_COCOA_TASK_MANAGER_MAC_H_
 #pragma once
 
 #import <Cocoa/Cocoa.h>
 #include <vector>
@@ skipping 11 matching lines @@
 // managing it.
 @interface TaskManagerWindowController :
   NSWindowController<NSTableViewDataSource,
                      NSTableViewDelegate> {
  @private
   IBOutlet NSTableView* tableView_;
   IBOutlet NSButton* endProcessButton_;
   TaskManagerMac* taskManagerObserver_;  // weak
   TaskManager* taskManager_;  // weak
   TaskManagerModel* model_;  // weak
+  bool highlightBackgroundResources_;
 
   scoped_nsobject<WindowSizeAutosaver> size_saver_;
 
   // These contain a permutation of [0..|model_->ResourceCount() - 1|]. Used to
   // implement sorting.
   std::vector<int> viewToModelMap_;
   std::vector<int> modelToViewMap_;
 
   // Descriptor of the current sort column.
   scoped_nsobject<NSSortDescriptor> currentSortDescriptor_;
+
+  // Color we use for background resources.
+  scoped_nsobject<NSColor> backgroundResourceColor_;
 }
 
 // Creates and shows the task manager's window.
-- (id)initWithTaskManagerObserver:(TaskManagerMac*)taskManagerObserver;
+- (id)initWithTaskManagerObserver:(TaskManagerMac*)taskManagerObserver
+     highlightBackgroundResources:(bool)highlightBackgroundResources;
 
 // Refreshes all data in the task manager table.
 - (void)reloadData;
 
 // Callback for "Stats for nerds" link.
 - (IBAction)statsLinkClicked:(id)sender;
 
 // Callback for "End process" button.
 - (IBAction)killSelectedProcesses:(id)sender;
 
 // Callback for double clicks on the table.
 - (void)selectDoubleClickedTab:(id)sender;
 @end
 
 @interface TaskManagerWindowController (TestingAPI)
 - (NSTableView*)tableView;
 @end
 
 // This class listens to task changed events sent by chrome.
 class TaskManagerMac : public TaskManagerModelObserver,
                        public TableRowNSImageCache::Table {
  public:
-  TaskManagerMac(TaskManager* task_manager);
+  TaskManagerMac(TaskManager* task_manager, bool highlight_background);
   virtual ~TaskManagerMac();
 
   // TaskManagerModelObserver
   virtual void OnModelChanged();
   virtual void OnItemsChanged(int start, int length);
   virtual void OnItemsAdded(int start, int length);
   virtual void OnItemsRemoved(int start, int length);
 
   // Called by the cocoa window controller when its window closes and the
   // controller destroyed itself. Informs the model to stop updating.
   void WindowWasClosed();
 
   // TableRowNSImageCache::Table
   virtual int RowCount() const;
   virtual SkBitmap GetIcon(int r) const;
 
   // Creates the task manager if it doesn't exist; otherwise, it activates the
-  // existing task manager window.
-  static void Show();
+  // existing task manager window. Highlights background resources if
+  // |highlight_background_resources| is true.
+  static void Show(bool highlight_background_resources);
 
   // Returns the TaskManager observed by |this|.
   TaskManager* task_manager() { return task_manager_; }
 
   // Lazily converts the image at the given row and caches it in |icon_cache_|.
   NSImage* GetImageForRow(int row);
 
   // Returns the cocoa object. Used for testing.
   TaskManagerWindowController* cocoa_controller() { return window_controller_; }
+
+  // Returns true if the resource at this location is a background resource.
+  bool IsBackgroundRow(int row) const;
  private:
   // The task manager.
   TaskManager* const task_manager_;  // weak
 
   // Our model.
   TaskManagerModel* const model_;  // weak
 
   // Controller of our window, destroys itself when the task manager window
   // is closed.
   TaskManagerWindowController* window_controller_;  // weak
 
   // Caches favicons for all rows. Needs to be initalized after |model_|.
   TableRowNSImageCache icon_cache_;
 
+  // If true, highlight background resources.
+  bool highlight_background_resources_;
+
   // An open task manager window. There can only be one open at a time. This
   // is reset to NULL when the window is closed.
   static TaskManagerMac* instance_;
 
   DISALLOW_COPY_AND_ASSIGN(TaskManagerMac);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_TASK_MANAGER_MAC_H_