Keep browser process alive while there are platform apps with background pages running.

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..88c92580e512668e455d290efcdce0b6f690e622 100644
--- a/chrome/browser/extensions/platform_app_browsertest_util.h
+++ b/chrome/browser/extensions/platform_app_browsertest_util.h
@@ -19,11 +19,23 @@ class ShellWindow;
 namespace extensions {
 class Extension;
 
+// TODO(benwells): Clean up this test hierarchy.
+// - rename this to PlatformAppApiTest
+// - remove the existing PlatformAppApiTest
+// - Move the CloseWindow* functions from ExtensionBrowserTest to here
+// - Move the RunPlatformAppTest functions from ExtensionApiTest to here
+// - Make all platform app tests use this class.
 class PlatformAppBrowserTest : public ExtensionApiTest {
  public:
   virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE;
 
  protected:
+  // Loads the app named |name| out of the platform_apps subdirectory.
+  const Extension* LoadPlatformApp(const char* name);
+
+  // Installs the app named |name| out of the platform_apps subdirectory.
+  const Extension* InstallPlatformApp(const char* name);
+
   // Runs the app named |name| out of the platform_apps subdirectory. Waits
   // until it is launched.
   const Extension* LoadAndLaunchPlatformApp(const char* name);
@@ -63,9 +75,6 @@ class PlatformAppBrowserTest : public ExtensionApiTest {
 
   // Creates an empty shell window for |extension|.
   ShellWindow* CreateShellWindow(const Extension* extension);
-
-  // Closes |window| and waits until it's gone.
-  void CloseShellWindow(ShellWindow* window);
 };
 
 }