Remove SendBeginFramesToChildren plumbing

content/browser/renderer_host/render_widget_host_view_mac.mm

 // 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_mac.h"
 
 #import <objc/runtime.h>
 #include <OpenGL/gl.h>
 #include <QuartzCore/QuartzCore.h>
 #include <stdint.h>
@@ skipping 464 matching lines @@
 void RenderWidgetHostViewMac::DelegatedFrameHostOnLostCompositorResources() {
   render_widget_host_->ScheduleComposite();
 }
 
 void RenderWidgetHostViewMac::DelegatedFrameHostUpdateVSyncParameters(
     const base::TimeTicks& timebase,
     const base::TimeDelta& interval) {
   render_widget_host_->UpdateVSyncParameters(timebase, interval);
 }
 
+void RenderWidgetHostViewMac::SetBeginFrameSource(
+    cc::BeginFrameSource* source) {
+  if (begin_frame_source_ && needs_begin_frames_)
+    begin_frame_source_->RemoveObserver(this);
+  begin_frame_source_ = source;
+  if (begin_frame_source_ && needs_begin_frames_)
+    begin_frame_source_->AddObserver(this);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// cc::BeginFrameSourceBase, public:
+
+void RenderWidgetHostViewMac::OnSetNeedsBeginFrames(bool needs_begin_frames) {
+  if (needs_begin_frames_ == needs_begin_frames)
+    return;
+
+  needs_begin_frames_ = needs_begin_frames;
+  if (begin_frame_source_) {
+    if (needs_begin_frames_)
+      begin_frame_source_->AddObserver(this);
+    else
+      begin_frame_source_->RemoveObserver(this);
+  }
+}
+
+bool RenderWidgetHostViewMac::OnBeginFrameDerivedImpl(
+    const cc::BeginFrameArgs& args) {
+  delegated_frame_host_->SetVSyncParameters(args.frame_time, args.interval);
+  render_widget_host_->Send(
+      new ViewMsg_BeginFrame(render_widget_host_->GetRoutingID(), args));
+  return true;
+}
+
+void RenderWidgetHostViewMac::OnBeginFrameSourcePausedChanged(
+    bool paused) {
+  // Nothing to do here.
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // AcceleratedWidgetMacNSView, public:
 
 NSView* RenderWidgetHostViewMac::AcceleratedWidgetGetNSView() const {
   return cocoa_view_;
 }
 
 void RenderWidgetHostViewMac::AcceleratedWidgetGetVSyncParameters(
     base::TimeTicks* timebase, base::TimeDelta* interval) const {
   if (display_link_ &&
@@ skipping 25 matching lines @@
     : render_widget_host_(RenderWidgetHostImpl::From(widget)),
       text_input_type_(ui::TEXT_INPUT_TYPE_NONE),
       can_compose_inline_(true),
       browser_compositor_state_(BrowserCompositorDestroyed),
       browser_compositor_placeholder_(new BrowserCompositorMacPlaceholder),
       page_at_minimum_scale_(true),
       is_loading_(false),
       allow_pause_for_resize_or_repaint_(true),
       is_guest_view_hack_(is_guest_view_hack),
       wheel_gestures_enabled_(UseGestureBasedWheelScrolling()),
-      fullscreen_parent_host_view_(NULL),
+      fullscreen_parent_host_view_(nullptr),
+      begin_frame_source_(nullptr),
+      needs_begin_frames_(false),
       weak_factory_(this) {
   // |cocoa_view_| owns us and we will be deleted when |cocoa_view_|
   // goes away.  Since we autorelease it, our caller must put
   // |GetNativeView()| into the view hierarchy right after calling us.
   cocoa_view_ = [[[RenderWidgetHostViewCocoa alloc]
                   initWithRenderWidgetHostViewMac:this] autorelease];
 
   // Paint this view host with |background_color_| when there is no content
   // ready to draw.
   background_layer_.reset([[CALayer alloc] init]);
@@ skipping 139 matching lines @@
   // This should only be reached if |render_widget_host_| is hidden, destroyed,
   // or in the process of being destroyed.
   DestroyBrowserCompositorView();
 }
 
 bool RenderWidgetHostViewMac::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(RenderWidgetHostViewMac, message)
     IPC_MESSAGE_HANDLER(ViewMsg_GetRenderedTextCompleted,
         OnGetRenderedTextCompleted)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_SetNeedsBeginFrames,
+                        OnSetNeedsBeginFrames)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void RenderWidgetHostViewMac::InitAsChild(
     gfx::NativeView parent_view) {
 }
 
 void RenderWidgetHostViewMac::InitAsPopup(
@@ skipping 2697 matching lines @@
 
 // "-webkit-app-region: drag | no-drag" is implemented on Mac by excluding
 // regions that are not draggable. (See ControlRegionView in
 // native_app_window_cocoa.mm). This requires the render host view to be
 // draggable by default.
 - (BOOL)mouseDownCanMoveWindow {
   return YES;
 }
 
 @end