Add a content API to create a message channel.

content/browser/android/content_view_core_impl.h

 // Copyright 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_BROWSER_ANDROID_CONTENT_VIEW_CORE_IMPL_H_
 #define CONTENT_BROWSER_ANDROID_CONTENT_VIEW_CORE_IMPL_H_
 
 #include <vector>
 
 #include "base/android/jni_android.h"
@@ skipping 147 matching lines @@
                                        jobject obj,
                                        jboolean enabled);
 
   void AddStyleSheetByURL(JNIEnv* env, jobject obj, jstring url);
   void ClearHistory(JNIEnv* env, jobject obj);
   void EvaluateJavaScript(JNIEnv* env,
                           jobject obj,
                           jstring script,
                           jobject callback,
                           jboolean start_renderer);
+  void CreateMessageChannel(JNIEnv* env,
+                            jobject obj,
+                            jobject callback);
   long GetNativeImeAdapter(JNIEnv* env, jobject obj);
   void SetFocus(JNIEnv* env, jobject obj, jboolean focused);
   void ScrollFocusedEditableNodeIntoView(JNIEnv* env, jobject obj);
   void SelectWordAroundCaret(JNIEnv* env, jobject obj);
 
   jint GetBackgroundColor(JNIEnv* env, jobject obj);
   void SetBackgroundColor(JNIEnv* env, jobject obj, jint color);
   void OnShow(JNIEnv* env, jobject obj);
   void OnHide(JNIEnv* env, jobject obj);
   void ClearSslPreferences(JNIEnv* env, jobject /* obj */);
@@ skipping 222 matching lines @@
       java_bridge_dispatcher_host_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentViewCoreImpl);
 };
 
 bool RegisterContentViewCore(JNIEnv* env);
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ANDROID_CONTENT_VIEW_CORE_IMPL_H_