Fix "unused variable" warnings.

chrome/browser/android/compositor/compositor_view.h

 // Copyright 2015 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_COMPOSITOR_COMPOSITOR_VIEW_H_
 #define CHROME_BROWSER_ANDROID_COMPOSITOR_COMPOSITOR_VIEW_H_
 
 #include <jni.h>
 
 #include "base/android/jni_android.h"
@@ skipping 39 matching lines @@
 class LayerTitleCache;
 class SceneLayer;
 class TabContentManager;
 class ToolbarLayer;
 
 class CompositorView : public content::CompositorClient,
                        public content::BrowserChildProcessObserver {
  public:
   CompositorView(JNIEnv* env,
                  jobject obj,
-                 jint empty_background_color,
                  jboolean low_mem_device,
                  ui::WindowAndroid* window_android,
-                 LayerTitleCache* layer_title_cache,
                  TabContentManager* tab_content_manager);
 
   void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& object);
 
   ui::ResourceManager* GetResourceManager();
   base::android::ScopedJavaLocalRef<jobject> GetResourceManager(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& jobj);
   void SetNeedsComposite(JNIEnv* env,
                          const base::android::JavaParamRef<jobject>& object);
@@ skipping 37 matching lines @@
   // content::BrowserChildProcessObserver implementation:
   void BrowserChildProcessHostDisconnected(
       const content::ChildProcessData& data) override;
   void BrowserChildProcessCrashed(const content::ChildProcessData& data,
                                   int exit_code) override;
 
   void SetBackground(bool visible, SkColor color);
 
   base::android::ScopedJavaGlobalRef<jobject> obj_;
   std::unique_ptr<content::Compositor> compositor_;
-  LayerTitleCache* layer_title_cache_;
   TabContentManager* tab_content_manager_;
 
   scoped_refptr<cc::SolidColorLayer> root_layer_;
   SceneLayer* scene_layer_;
   scoped_refptr<cc::Layer> scene_layer_layer_;
 
   int current_surface_format_;
   int content_width_;
   int content_height_;
   bool overlay_video_mode_;
-  SkColor empty_background_color_;
 
   base::WeakPtrFactory<CompositorView> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CompositorView);
 };
 
 bool RegisterCompositorView(JNIEnv* env);
 
 }  // namespace android
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_ANDROID_COMPOSITOR_COMPOSITOR_VIEW_H_