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

chrome/test/test_browser_window.h

Index: chrome/test/test_browser_window.h
diff --git a/chrome/test/test_browser_window.h b/chrome/test/test_browser_window.h
index cb332db0bac7c2e70865c84e0f8f544e67e12b20..e6d82b6cd42945d122f8f8c19ed86969dd3d03b9 100644
--- a/chrome/test/test_browser_window.h
+++ b/chrome/test/test_browser_window.h
@@ -76,6 +76,7 @@ class TestBrowserWindow : public BrowserWindow {
   virtual views::Window* ShowAboutChromeDialog() { return NULL; }
   virtual void ShowUpdateChromeDialog() {}
   virtual void ShowTaskManager() {}
+  virtual void ShowBackgroundPages() {}
   virtual void ShowBookmarkManager() {}
   virtual void ShowBookmarkBubble(const GURL& url, bool already_bookmarked) {}
   virtual bool IsDownloadShelfVisible() const { return false; }