Add ContextMenu support upstream for Android

chrome/browser/ui/android/context_menu_helper.h

Index: chrome/browser/ui/android/context_menu_helper.h
diff --git a/chrome/browser/ui/android/context_menu_helper.h b/chrome/browser/ui/android/context_menu_helper.h
new file mode 100644
index 0000000000000000000000000000000000000000..cf01818602465bfe8e7a847a5d3f507ce2f525c5
--- /dev/null
+++ b/chrome/browser/ui/android/context_menu_helper.h
@@ -0,0 +1,55 @@
+// Copyright 2013 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 CHROME_BROWSER_UI_ANDROID_CONTEXT_MENU_HELPER_H_
+#define CHROME_BROWSER_UI_ANDROID_CONTEXT_MENU_HELPER_H_
+
+#include "base/android/jni_android.h"
+#include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
+#include "content/public/browser/web_contents_user_data.h"
+#include "content/public/common/context_menu_params.h"
+
+namespace content {
+struct ContextMenuParams;
+class WebContents;
+}
+
+class ContextMenuHelper
+    : public content::WebContentsUserData<ContextMenuHelper> {
+ public:
+  virtual ~ContextMenuHelper();
+
+  void ShowContextMenu(const content::ContextMenuParams& params);
+
+  void ShowCustomContextMenu(
+      const content::ContextMenuParams& params,
+      const base::Callback<void(int)>& callback);
+
+  void SetPopulator(jobject jpopulator);
+
+  // Methods called from Java via JNI ------------------------------------------
+
+  void OnCustomItemSelected(JNIEnv* env, jobject obj, jint action);
+  void OnStartDownload(JNIEnv* env, jobject obj, jboolean jis_link);
+
+ private:
+  explicit ContextMenuHelper(content::WebContents* web_contents);
+  friend class content::WebContentsUserData<ContextMenuHelper>;
+
+  static base::android::ScopedJavaLocalRef<jobject> CreateJavaContextMenuParams(
+      const content::ContextMenuParams& params);
+
+  base::android::ScopedJavaGlobalRef<jobject> java_obj_;
+  content::WebContents* web_contents_;
+
+  base::Callback<void(int)> context_menu_callback_;
+  content::ContextMenuParams context_menu_params_;
+
+  DISALLOW_COPY_AND_ASSIGN(ContextMenuHelper);
+};
+
+bool RegisterContextMenuHelper(JNIEnv* env);
+
+#endif  // CHROME_BROWSER_UI_ANDROID_CONTEXT_MENU_HELPER_H_