Add GTK interface for installing bundles of extensions.

chrome/browser/extensions/bundle_installer.h

Index: chrome/browser/extensions/bundle_installer.h
diff --git a/chrome/browser/extensions/bundle_installer.h b/chrome/browser/extensions/bundle_installer.h
index dec681d946f76e3068ccc2664cd6e92998234ddc..1818041e29a178becfed8b5f954aa214056b87bd 100644
--- a/chrome/browser/extensions/bundle_installer.h
+++ b/chrome/browser/extensions/bundle_installer.h
@@ -10,6 +10,7 @@
 #include <vector>
 
 #include "base/memory/linked_ptr.h"
+#include "base/string16.h"
 #include "chrome/browser/extensions/extension_install_ui.h"
 #include "chrome/browser/extensions/webstore_installer.h"
 #include "chrome/browser/extensions/webstore_install_helper.h"
@@ -96,6 +97,15 @@ class BundleInstaller : public WebstoreInstallHelper::Delegate,
                        Browser* browser,
                        Delegate* delegate);
 
+  // We change the headings in the install prompt and installed bubble depending
+  // on whether the bundle contains apps, extensions or both. This method gets
+  // the correct heading for the items in the specified |state|, or an empty
+  // string if no items are in the |state|.
+  //   STATE_PENDING   - install prompt
+  //   STATE_INSTALLED - installed bubble successful installs list
+  //   STATE_FAILED    - installed bubble failed installs list
+  string16 GetHeadingTextFor(Item::State state) const;
+
  private:
   friend class base::RefCountedThreadSafe<BundleInstaller>;