Revert of Wake Lock API implementation (Chromium part)

content/browser/wake_lock/wake_lock_service_context.cc

Index: content/browser/wake_lock/wake_lock_service_context.cc
diff --git a/content/browser/wake_lock/wake_lock_service_context.cc b/content/browser/wake_lock/wake_lock_service_context.cc
deleted file mode 100644
index 6b9a36daf9486dd2f76d95548ddd5feeef8b90da..0000000000000000000000000000000000000000
--- a/content/browser/wake_lock/wake_lock_service_context.cc
+++ /dev/null
@@ -1,87 +0,0 @@
-// 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 "content/browser/wake_lock/wake_lock_service_context.h"
-
-#include "base/bind.h"
-#include "content/browser/frame_host/frame_tree_node.h"
-#include "content/browser/frame_host/render_frame_host_impl.h"
-#include "content/browser/power_save_blocker_impl.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/browser/power_save_blocker.h"
-#include "content/public/common/service_registry.h"
-
-namespace content {
-
-WakeLockServiceContext::WakeLockServiceContext(WebContents* web_contents)
-    : WebContentsObserver(web_contents),
-      weak_factory_(this) {
-}
-
-WakeLockServiceContext::~WakeLockServiceContext() {
-}
-
-void WakeLockServiceContext::CreateService(
-    int frame_id,
-    mojo::InterfaceRequest<WakeLockService> request) {
-  new WakeLockServiceImpl(weak_factory_.GetWeakPtr(),
-                          frame_id,
-                          request.Pass());
-}
-
-void WakeLockServiceContext::RenderFrameDeleted(
-    RenderFrameHost* render_frame_host) {
-  RenderFrameHostImpl* rfh_impl =
-      static_cast<RenderFrameHostImpl*>(render_frame_host);
-  CancelWakeLock(rfh_impl->frame_tree_node()->frame_tree_node_id());
-}
-
-void WakeLockServiceContext::RequestWakeLock(int frame_id) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  frames_requesting_lock_.insert(frame_id);
-  UpdateWakeLock();
-}
-
-void WakeLockServiceContext::CancelWakeLock(int frame_id) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  frames_requesting_lock_.erase(frame_id);
-  UpdateWakeLock();
-}
-
-bool WakeLockServiceContext::HasWakeLockForTests() const {
-  return wake_lock_;
-}
-
-void WakeLockServiceContext::CreateWakeLock() {
-  DCHECK(!wake_lock_);
-  wake_lock_ = PowerSaveBlocker::Create(
-      PowerSaveBlocker::kPowerSaveBlockPreventDisplaySleep,
-      PowerSaveBlocker::kReasonOther,
-      "Wake Lock API");
-
-  // On Android, additionaly associate the blocker with this WebContents.
-#if defined(OS_ANDROID)
-  DCHECK(web_contents());
-
-  static_cast<PowerSaveBlockerImpl*>(wake_lock_.get())->InitDisplaySleepBlocker(
-      web_contents());
-#endif
-}
-
-void WakeLockServiceContext::RemoveWakeLock() {
-  DCHECK(wake_lock_);
-  wake_lock_.reset();
-}
-
-void WakeLockServiceContext::UpdateWakeLock() {
-  if (!frames_requesting_lock_.empty()) {
-    if (!wake_lock_)
-      CreateWakeLock();
-  } else {
-    if (wake_lock_)
-      RemoveWakeLock();
-  }
-}
-
-}  // namespace content