Remove dependency of power_save_blocker_android on various content bits

content/browser/wake_lock/wake_lock_service_context.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 CONTENT_BROWSER_WAKE_LOCK_WAKE_LOCK_SERVICE_CONTEXT_H_
 #define CONTENT_BROWSER_WAKE_LOCK_WAKE_LOCK_SERVICE_CONTEXT_H_
 
 #include <memory>
 #include <set>
 #include <utility>
@@ skipping 17 matching lines @@
   ~WakeLockServiceContext() override;
 
   // Creates a WakeLockServiceImpl that is strongly bound to |request|.
   void CreateService(
       int render_process_id,
       int render_frame_id,
       mojo::InterfaceRequest<blink::mojom::WakeLockService> request);
 
   // WebContentsObserver implementation.
   void RenderFrameDeleted(RenderFrameHost* render_frame_host) override;
+  void WebContentsDestroyed() override;
 
   // Requests wake lock for RenderFrame identified by |render_process_id| and
   // |render_frame_id|.
   void RequestWakeLock(int render_process_id, int render_frame_id);
 
   // Cancels wake lock request for RenderFrame identified by
   // |render_process_id| and |render_frame_id|.
   void CancelWakeLock(int render_process_id, int render_frame_id);
 
   // Used by tests.
@@ skipping 12 matching lines @@
   std::unique_ptr<PowerSaveBlocker> wake_lock_;
 
   base::WeakPtrFactory<WakeLockServiceContext> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WakeLockServiceContext);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WAKE_LOCK_WAKE_LOCK_SERVICE_CONTEXT_H_