Implement new task manager mocks on windows.

chrome/browser/task_manager/task_manager.h

Index: chrome/browser/task_manager/task_manager.h
diff --git a/chrome/browser/task_manager/task_manager.h b/chrome/browser/task_manager/task_manager.h
index cef241cbbda9b256f9ded71eb8e64b079ca4fcac..9d933e58c79f17bddb0061489c5856a06e7f53d7 100644
--- a/chrome/browser/task_manager/task_manager.h
+++ b/chrome/browser/task_manager/task_manager.h
@@ -102,6 +102,10 @@ class TaskManager {
         const WebKit::WebCache::ResourceTypeStats& stats) {}
     virtual void NotifyV8HeapStats(size_t v8_memory_allocated,
                                    size_t v8_memory_used) {}
+
+    // Returns true if this resource is not visible to the user because it lives
+    // in the background (e.g. extension background page, background contents).
+    virtual bool IsBackground() const { return false; }
   };
 
   // ResourceProviders are responsible for adding/removing resources to the task
@@ -156,6 +160,12 @@ class TaskManager {
 
   void OnWindowClosed();
 
+  // Invoked when a change to a resource has occurred that should cause any
+  // observers to completely refresh themselves (for example, the creation of
+  // a background resource in a process). Results in all observers receiving
+  // OnModelChanged() events.
+  void ModelChanged();
+
   // Returns the singleton instance (and initializes it if necessary).
   static TaskManager* GetInstance();
 
@@ -259,6 +269,10 @@ class TaskManagerModel : public URLRequestJobTracker::JobObserver,
   // rendered by the same process are groupped together).
   bool IsResourceFirstInGroup(int index) const;
 
+  // Returns true if the resource runs in the background (not visible to the
+  // user, e.g. extension background pages and BackgroundContents).
+  bool IsBackgroundResource(int index) const;
+
   // Returns icon to be used for resource (for example a favicon).
   SkBitmap GetResourceIcon(int index) const;
 
@@ -300,6 +314,10 @@ class TaskManagerModel : public URLRequestJobTracker::JobObserver,
 
   void Clear();  // Removes all items.
 
+  // Sends OnModelChanged() to all observers to inform them of significant
+  // changes to the model.
+  void ModelChanged();
+
   void NotifyResourceTypeStats(
         base::ProcessId renderer_id,
         const WebKit::WebCache::ResourceTypeStats& stats);