Expose whether a frame is focused to the browser process

content/browser/frame_host/render_frame_host_impl.cc

 // Copyright 2013 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/frame_host/render_frame_host_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
@@ skipping 240 matching lines @@
 }
 
 RenderViewHost* RenderFrameHostImpl::GetRenderViewHost() {
   return render_view_host_;
 }
 
 ServiceRegistry* RenderFrameHostImpl::GetServiceRegistry() {
   return service_registry_.get();
 }
 
+bool RenderFrameHostImpl::IsFocused() {
+  return GetRenderWidgetHost()->is_focused() &&
+         frame_tree_->GetFocusedFrame() &&
+         frame_tree_->GetFocusedFrame()->current_frame_host() == this;
+}
+
 bool RenderFrameHostImpl::Send(IPC::Message* message) {
   if (IPC_MESSAGE_ID_CLASS(message->type()) == InputMsgStart) {
     return render_view_host_->input_router()->SendInput(
         make_scoped_ptr(message));
   }
 
   return GetProcess()->Send(message);
 }
 
 bool RenderFrameHostImpl::OnMessageReceived(const IPC::Message &msg) {
@@ skipping 453 matching lines @@
 }
 
 void RenderFrameHostImpl::OnDidDropNavigation() {
   // At the end of Navigate(), the delegate's DidStartLoading is called to force
   // the spinner to start, even if the renderer didn't yet begin the load. If it
   // turns out that the renderer dropped the navigation, we need to turn off the
   // spinner.
   delegate_->DidStopLoading(this);
 }
 
-RenderWidgetHostImpl* RenderFrameHostImpl::GetRenderWidgetHost() {
+RenderWidgetHostImpl* RenderFrameHostImpl::GetRenderWidgetHost() const {
   return static_cast<RenderWidgetHostImpl*>(render_view_host_);
 }
 
 int RenderFrameHostImpl::GetEnabledBindings() {
   return render_view_host_->GetEnabledBindings();
 }
 
 void RenderFrameHostImpl::OnCrossSiteResponse(
     const GlobalRequestID& global_request_id,
     scoped_ptr<CrossSiteTransferringRequest> cross_site_transferring_request,
@@ skipping 897 matching lines @@
 void RenderFrameHostImpl::DidUseGeolocationPermission() {
   RenderFrameHost* top_frame = frame_tree_node()->frame_tree()->GetMainFrame();
   GetContentClient()->browser()->RegisterPermissionUsage(
       PERMISSION_GEOLOCATION,
       delegate_->GetAsWebContents(),
       GetLastCommittedURL().GetOrigin(),
       top_frame->GetLastCommittedURL().GetOrigin());
 }
 
 }  // namespace content