Propagate error messages to UI for blimp.

chrome/browser/android/blimp/chrome_blimp_client_context_delegate_android.h

 // Copyright 2016 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_ANDROID_BLIMP_CHROME_BLIMP_CLIENT_CONTEXT_DELEGATE_ANDROID_H_
 #define CHROME_BROWSER_ANDROID_BLIMP_CHROME_BLIMP_CLIENT_CONTEXT_DELEGATE_ANDROID_H_
 
 #include "base/android/jni_android.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "chrome/browser/android/blimp/chrome_blimp_client_context_delegate.h"
 
 // Android implementation of ChromeBlimpClientContextDelegate which is partly
 // backed by Java.
 class ChromeBlimpClientContextDelegateAndroid
     : public ChromeBlimpClientContextDelegate {
  public:
   static bool RegisterJni(JNIEnv* env);
 
   ChromeBlimpClientContextDelegateAndroid(JNIEnv* env,
                                           jobject jobj,
                                           Profile* profile);
   ~ChromeBlimpClientContextDelegateAndroid() override;
 
   void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& jobj);
 
  private:
+  // ChromeBlimpClientContextDelegate implementation.
+  void ShowMessage(const base::string16& message, bool short_message) override;
+
   base::android::ScopedJavaGlobalRef<jobject> java_obj_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeBlimpClientContextDelegateAndroid);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_BLIMP_CHROME_BLIMP_CLIENT_CONTEXT_DELEGATE_ANDROID_H_