Properly throw java exceptions from shouldOverrideUrlLoading

base/android/java_handler_thread.h

 // 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 BASE_ANDROID_JAVA_HANDLER_THREAD_H_
 #define BASE_ANDROID_JAVA_HANDLER_THREAD_H_
 
 #include <jni.h>
 
 #include <memory>
@@ skipping 23 matching lines @@
 
   // Called from java on the newly created thread.
   // Start() will not return before this methods has finished.
   void InitializeThread(JNIEnv* env,
                         const JavaParamRef<jobject>& obj,
                         jlong event);
   void StopThread(JNIEnv* env,
                   const JavaParamRef<jobject>& obj,
                   jlong event);
 
+  virtual void StartMessageLoop();
+  virtual void StopMessageLoop();
+
   static bool RegisterBindings(JNIEnv* env);
 
+ protected:
+  std::unique_ptr<base::MessageLoop> message_loop_;
+
  private:
-  std::unique_ptr<base::MessageLoop> message_loop_;
   ScopedJavaGlobalRef<jobject> java_thread_;
 };
 
 }  // namespace android
 }  // namespace base
 
 #endif  // BASE_ANDROID_JAVA_HANDLER_THREAD_H_