Do not add TabContents from packaged apps to the task manager.

chrome/browser/extensions/platform_app_browsertest_util.h

Index: chrome/browser/extensions/platform_app_browsertest_util.h
diff --git a/chrome/browser/extensions/platform_app_browsertest_util.h b/chrome/browser/extensions/platform_app_browsertest_util.h
index 3d3a2a7d40efd36e9d4d74b9e443b0147b72f2b3..56b43758b9b99481abfe11861ac08ae30b1a6f9a 100644
--- a/chrome/browser/extensions/platform_app_browsertest_util.h
+++ b/chrome/browser/extensions/platform_app_browsertest_util.h
@@ -26,7 +26,12 @@ class PlatformAppBrowserTest : public ExtensionApiTest {
  protected:
   // Runs the app named |name| out of the platform_apps subdirectory. Waits
   // until it is launched.
-  const Extension* LoadAndLaunchPlatformApp(const char* name);
+  static const Extension* LoadAndLaunchPlatformApp(
+      Browser* browser, NotificationObserver* observer,
+      FilePath test_data_dir_, const char* name);
+  const Extension* LoadAndLaunchPlatformApp(const char* name) {
+    return LoadAndLaunchPlatformApp(browser(), this, test_data_dir_, name);
+  }
 
   // Installs and runs the app named |name| out of the platform_apps
   // subdirectory. Waits until it is launched.