Rationalize WakeLock naming conventions

device/wake_lock/wake_lock_context.cc

 // 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.
 
-#include "device/wake_lock/wake_lock_service_context.h"
+#include "device/wake_lock/wake_lock_context.h"
 
 #include <utility>
 
-#include "device/wake_lock/wake_lock_service_impl.h"
+#include "device/wake_lock/wake_lock.h"
 
 namespace device {
 
-const int WakeLockServiceContext::WakeLockInvalidContextId = -1;
+const int WakeLockContext::WakeLockInvalidContextId = -1;
 
-WakeLockServiceContext::WakeLockServiceContext(
+WakeLockContext::WakeLockContext(
     int context_id,
     scoped_refptr<base::SingleThreadTaskRunner> file_task_runner,
     const WakeLockContextCallback& native_view_getter)
     : file_task_runner_(std::move(file_task_runner)),
       context_id_(context_id),
       native_view_getter_(native_view_getter) {}
 
-WakeLockServiceContext::~WakeLockServiceContext() {}
+WakeLockContext::~WakeLockContext() {}
 
-void WakeLockServiceContext::GetWakeLock(
-    mojom::WakeLockType type,
-    mojom::WakeLockReason reason,
-    const std::string& description,
-    mojom::WakeLockServiceRequest request) {
-  // WakeLockServiceImpl owns itself.
-  new WakeLockServiceImpl(std::move(request), type, reason, description,
-                          context_id_, native_view_getter_, file_task_runner_);
+void WakeLockContext::GetWakeLock(mojom::WakeLockType type,
+                                  mojom::WakeLockReason reason,
+                                  const std::string& description,
+                                  mojom::WakeLockRequest request) {
+  // WakeLock owns itself.
+  new WakeLock(std::move(request), type, reason, description, context_id_,
+               native_view_getter_, file_task_runner_);
 }
 
 }  // namespace device