Make Page Visibility API work when the browser window is visible or not

content/browser/renderer_host/render_widget_host_view_aura.cc

 // Copyright (c) 2012 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/renderer_host/render_widget_host_view_aura.h"
 
 #include "base/auto_reset.h"
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 1412 matching lines @@
   aura::client::CursorClient* cursor_client =
       aura::client::GetCursorClient(root_window);
   if (cursor_client) {
     cursor_client->UnlockCursor();
     cursor_client->ShowCursor();
   }
 
   host_->LostMouseLock();
 }
 
+void RenderWidgetHostViewAura::SetWindowVisibility(bool visible) {
+  if (host_)
+    host_->Send(new ViewMsg_SetWindowVisibility(host_->GetRoutingID(),
+        visible));
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewAura, ui::TextInputClient implementation:
 void RenderWidgetHostViewAura::SetCompositionText(
     const ui::CompositionText& composition) {
   if (!host_)
     return;
 
   // TODO(suzhe): convert both renderer_host and renderer to use
   // ui::CompositionText.
   std::vector<blink::WebCompositionUnderline> underlines;
@@ skipping 826 matching lines @@
 // RenderWidgetHostViewAura, aura::WindowTreeHostObserver implementation:
 
 void RenderWidgetHostViewAura::OnHostMoved(const aura::WindowTreeHost* host,
                                            const gfx::Point& new_origin) {
   TRACE_EVENT1("ui", "RenderWidgetHostViewAura::OnHostMoved",
                "new_origin", new_origin.ToString());
 
   UpdateScreenInfo(window_);
 }
 
+void RenderWidgetHostViewAura::OnHostSetWindowVisibility(
+    const aura::WindowTreeHost* host, bool visible) {
+  SetWindowVisibility(visible);
+}
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewAura, private:
 
 RenderWidgetHostViewAura::~RenderWidgetHostViewAura() {
   if (touch_editing_client_)
     touch_editing_client_->OnViewDestroyed();
 
   delegated_frame_host_.reset();
   window_observer_.reset();
   if (window_->GetHost())
@@ skipping 404 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewBase, public:
 
 // static
 void RenderWidgetHostViewBase::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content