Add flow control between renderer and GPU processes, and, on Mac OS X,...

chrome/browser/renderer_host/render_widget_host_view_mac.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_
 #define CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_
 #pragma once
 
 #import <Cocoa/Cocoa.h>
 #import <QuartzCore/CALayer.h>
@@ skipping 225 matching lines @@
 
   virtual void AcceleratedSurfaceSetIOSurface(gfx::PluginWindowHandle window,
                                               int32 width,
                                               int32 height,
                                               uint64 io_surface_identifier);
   virtual void AcceleratedSurfaceSetTransportDIB(
       gfx::PluginWindowHandle window,
       int32 width,
       int32 height,
       TransportDIB::Handle transport_dib);
-  virtual void AcceleratedSurfaceBuffersSwapped(gfx::PluginWindowHandle window,
-                                                uint64 surface_id);
+  virtual void AcceleratedSurfaceBuffersSwapped(
+      gfx::PluginWindowHandle window,
+      uint64 surface_id,
+      int32 renderer_id,
+      int32 route_id,
+      uint64 swap_buffers_count);
   virtual void GpuRenderingStateDidChange();
   void DrawAcceleratedSurfaceInstance(
       CGLContextObj context,
       gfx::PluginWindowHandle plugin_handle,
       NSSize size);
   // Forces the textures associated with any accelerated plugin instances
   // to be reloaded.
   void ForceTextureReload();
 
   virtual void SetVisuallyDeemphasized(bool deemphasized);
 
   void KillSelf();
 
   void SetTextInputActive(bool active);
 
   // Sends confirmed plugin IME text back to the renderer.
   void PluginImeCompositionConfirmed(const string16& text, int plugin_id);
 
   const std::string& selected_text() const { return selected_text_; }
 
   void UpdateRootGpuViewVisibility(bool show_gpu_widget);
 
   // When rendering transitions from gpu to software, the gpu widget can't be
   // hidden until the software backing store has been updated. This method
   // checks if the GPU view needs to be hidden and hides it if necessary. It
   // should be called after the software backing store has been painted to.
   void HandleDelayedGpuViewHiding();
 
+  // This is called from the display link thread, and provides the GPU
+  // process a notion of how quickly the browser is able to keep up with it.
+  void AcknowledgeSwapBuffers(int renderer_id,
+                              int32 route_id,
+                              uint64 swap_buffers_count);
+
   // These member variables should be private, but the associated ObjC class
   // needs access to them and can't be made a friend.
 
   // The associated Model.  Can be NULL if Destroy() is called when
   // someone (other than superview) has retained |cocoa_view_|.
   RenderWidgetHost* render_widget_host_;
 
   // This is true when we are currently painting and thus should handle extra
   // paint requests by expanding the invalid rect rather than actually painting.
   bool about_to_validate_and_paint_;
@@ skipping 64 matching lines @@
 
   // When rendering transitions from gpu to software, the gpu widget can't be
   // hidden until the software backing store has been updated. This variable is
   // set when the gpu widget needs to be hidden once a paint is completed.
   bool needs_gpu_visibility_update_after_repaint_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewMac);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_