Implement new task manager mocks on windows.

chrome/browser/task_manager/task_manager_resource_providers.cc

Index: chrome/browser/task_manager/task_manager_resource_providers.cc
diff --git a/chrome/browser/task_manager/task_manager_resource_providers.cc b/chrome/browser/task_manager/task_manager_resource_providers.cc
index 13cd82fab50d5ff780f0539fb76fe5fbf52728b7..73476c9027a15e66c131f57644608b0be18d1246 100644
--- a/chrome/browser/task_manager/task_manager_resource_providers.cc
+++ b/chrome/browser/task_manager/task_manager_resource_providers.cc
@@ -382,6 +382,10 @@ SkBitmap TaskManagerBackgroundContentsResource::GetIcon() const {
   return *default_icon_;
 }
 
+bool TaskManagerBackgroundContentsResource::IsBackground() const {
+  return true;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // TaskManagerBackgroundContentsResourceProvider class
 ////////////////////////////////////////////////////////////////////////////////
@@ -550,6 +554,9 @@ void TaskManagerBackgroundContentsResourceProvider::Observe(
       }
       Add(Details<BackgroundContentsOpenedDetails>(details)->contents,
           application_name);
+      // Opening a new BackgroundContents needs to force the display to refresh
+      // (applications may now be considered "background" that weren't before).
+      task_manager_->ModelChanged();
       break;
     }
     case NotificationType::BACKGROUND_CONTENTS_NAVIGATED: {
@@ -565,6 +572,9 @@ void TaskManagerBackgroundContentsResourceProvider::Observe(
     }
     case NotificationType::BACKGROUND_CONTENTS_DELETED:
       Remove(Details<BackgroundContents>(details).ptr());
+      // Closing a BackgroundContents needs to force the display to refresh
+      // (applications may now be considered "foreground" that weren't before).
+      task_manager_->ModelChanged();
       break;
     default:
       NOTREACHED() << "Unexpected notification.";
@@ -847,6 +857,11 @@ const Extension* TaskManagerExtensionProcessResource::GetExtension() const {
   return extension_host_->extension();
 }
 
+bool TaskManagerExtensionProcessResource::IsBackground() const {
+  return extension_host_->GetRenderViewType() ==
+      ViewType::EXTENSION_BACKGROUND_PAGE;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // TaskManagerExtensionProcessResourceProvider class
 ////////////////////////////////////////////////////////////////////////////////