Added HostedAppLaunch for testing hosted app shims on Mac.

chrome/browser/apps/app_browsertest_util.h

Index: chrome/browser/apps/app_browsertest_util.h
diff --git a/chrome/browser/apps/app_browsertest_util.h b/chrome/browser/apps/app_browsertest_util.h
index b9fe3a82918d8fdc44f7068d71d28ef71baf140b..23aba873b76dad193869b540586c6b04b8739946 100644
--- a/chrome/browser/apps/app_browsertest_util.h
+++ b/chrome/browser/apps/app_browsertest_util.h
@@ -46,6 +46,9 @@ class PlatformAppBrowserTest : public ExtensionApiTest {
   // Installs the app named |name| out of the platform_apps subdirectory.
   const Extension* InstallPlatformApp(const char* name);
 
+  // Installs the sample hosted app.
+  const Extension* InstallHostedApp();
+
   // Installs and runs the app named |name| out of the platform_apps
   // subdirectory. Waits until it is launched.
   const Extension* InstallAndLaunchPlatformApp(const char* name);
@@ -53,6 +56,9 @@ class PlatformAppBrowserTest : public ExtensionApiTest {
   // Launch the given platform app.
   virtual void LaunchPlatformApp(const Extension* extension);
 
+  // Launch the given hosted app.
+  virtual void LaunchHostedApp(const Extension* extension);
+
   // Gets the WebContents associated with the first app window that is found
   // (most tests only deal with one platform app window, so this is good
   // enough).