WakeLock API: IPC at browser side.

content/browser/wake_lock/wake_lock_dispatcher_host.cc

+// Copyright 2014 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_dispatcher_host.h"
+
+#include "content/browser/renderer_host/render_view_host_impl.h"
+#include "content/common/wake_lock_messages.h"
+#include "content/public/browser/web_contents.h"
+
+namespace content {
+
+WakeLockDispatcherHost::WakeLockDispatcherHost(
+    WebContents* web_contents)
+    : WebContentsObserver(web_contents) {
+}
+
+WakeLockDispatcherHost::~WakeLockDispatcherHost() {
+}
+
+bool WakeLockDispatcherHost::OnMessageReceived(
+    const IPC::Message& message) {
+  bool handled = true;
+
+  IPC_BEGIN_MESSAGE_MAP(WakeLockDispatcherHost, message)
+    IPC_MESSAGE_HANDLER(WakeLockViewHostMsg_RequestLock, OnRequestWakeLock)
+    IPC_MESSAGE_HANDLER(WakeLockViewHostMsg_RequestUnlock, OnRequestWakeUnlock)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+
+  return handled;
+}
+
+void WakeLockDispatcherHost::OnRequestWakeLock(
+    const blink::WakeLockRequestInfo& info,
+    const GURL&) {
+  // TODO(redchenko): Get permission (infobar).
+  SendWakeLockPermissionResponse(info, false);
+}
+
+void WakeLockDispatcherHost::OnRequestWakeUnlock(
+    const blink::WakeLockRequestInfo& info) {
+  if (RenderViewHost* host = web_contents()->GetRenderViewHost()) {
+    const int routed_id = host->GetRoutingID();
+    // TODO(redchenko): Request to WakeLockManager for real unlock resource
+    const bool isUnlocked = true;
+    if (isUnlocked) {
+      host->Send(new WakeLockViewMsg_UnlockedSuccessful(
+          routed_id, info.requestId));
+    } else {
+      host->Send(new WakeLockViewMsg_UnlockedFailed(
+          routed_id, info.requestId));
+    }
+  }
+}
+
+void WakeLockDispatcherHost::SendWakeLockPermissionResponse(
+    const blink::WakeLockRequestInfo& info,
+    bool allowed) {
+  if (RenderViewHost* host = web_contents()->GetRenderViewHost()) {
+    const int routed_id = host->GetRoutingID();

[mlamouri (slow - plz ping), 2014/09/03 13:20:56]

If you use the routing id, shouldn't you use ::OnMessageReceived(const
IPC::Message&, RenderFrameHost*), then you can use
render_frame_host->GetRoutingID(). I think what you are doing here isn't quite
right with regards to frame isolation.

+    if (allowed) {
+      host->Send(new WakeLockViewMsg_LockedSuccessful(
+          routed_id, info.requestId));
+    } else {
+      host->Send(new WakeLockViewMsg_LockedFailed(
+          routed_id, info.requestId));
+    }
+  }
+}
+}  // namespace content