Add context popup menu support for content shell[GTK].

content/shell/shell_web_contents_view_delegate_creator.h

Index: content/shell/shell_web_contents_view_delegate_creator.h
diff --git a/content/shell/shell_web_contents_view_delegate_creator.h b/content/shell/shell_web_contents_view_delegate_creator.h
new file mode 100644
index 0000000000000000000000000000000000000000..707bbd967939e4d84d9c6e53979f27c0538172f6
--- /dev/null
+++ b/content/shell/shell_web_contents_view_delegate_creator.h
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_SHELL_SHELL_WEB_CONTENTS_VIEW_DELEGATE_CREATOR_H_
+#define CONTENT_SHELL_SHELL_WEB_CONTENTS_VIEW_DELEGATE_CREATOR_H_
+
+namespace content {
+
+class WebContents;
+class WebContentsViewDelegate;
+
+WebContentsViewDelegate* CreateShellWebContentsViewDelegate(
+    WebContents* web_contents);
+
+}  // namespace content
+
+#endif //CONTENT_SHELL_SHELL_WEB_CONTENTS_VIEW_DELEGATE_CREATOR_H_