Android: Allow compiling browser without Java UI

chrome/browser/speech/tts_android.h

 // Copyright (c) 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_SPEECH_TTS_ANDROID_H_
 #define CHROME_BROWSER_SPEECH_TTS_ANDROID_H_
 
 #include "base/android/jni_android.h"
 #include "base/android/scoped_java_ref.h"
 #include "chrome/browser/speech/tts_platform.h"
@@ skipping 14 matching lines @@
   void GetVoices(std::vector<VoiceData>* out_voices) override;
 
   // Methods called from Java via JNI.
   void VoicesChanged(JNIEnv* env, jobject obj);
   void OnEndEvent(JNIEnv* env, jobject obj, jint utterance_id);
   void OnErrorEvent(JNIEnv* env, jobject obj, jint utterance_id);
   void OnStartEvent(JNIEnv* env, jobject obj, jint utterance_id);
 
   // Static functions.
   static TtsPlatformImplAndroid* GetInstance();
+#if defined(ANDROID_JAVA_UI)
   static bool Register(JNIEnv* env);
+#endif
 
  private:
   friend struct base::DefaultSingletonTraits<TtsPlatformImplAndroid>;
 
   TtsPlatformImplAndroid();
   ~TtsPlatformImplAndroid() override;
 
   void SendFinalTtsEvent(
       int utterance_id, TtsEventType event_type, int char_index);
 
   base::android::ScopedJavaGlobalRef<jobject> java_ref_;
   int utterance_id_;
   std::string utterance_;
 
   DISALLOW_COPY_AND_ASSIGN(TtsPlatformImplAndroid);
 };
 
 #endif  // CHROME_BROWSER_SPEECH_TTS_ANDROID_H_