MacViews: Synchronize resize operations with the GPU process

ui/views/cocoa/bridged_native_widget.h

 // 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.
 
 #ifndef UI_VIEWS_COCOA_BRIDGED_NATIVE_WIDGET_H_
 #define UI_VIEWS_COCOA_BRIDGED_NATIVE_WIDGET_H_
 
 #import <Cocoa/Cocoa.h>
 #include <vector>
 
@@ skipping 183 matching lines @@
   void DestroyCompositor();
 
   // Installs the NSView for hosting the composited layer. It is later provided
   // to |compositor_widget_| via AcceleratedWidgetGetNSView().
   void AddCompositorSuperview();
 
   // Size the layer to match the client area bounds, taking into account display
   // scale factor.
   void UpdateLayerProperties();
 
+  // Immediately return if there is a composited frame matching |size_in_dip|.
+  // Otherwise, asks ui::WindowResizeHelperMac to run tasks until a matching
+  // frame is ready, or a timeout occurs.
+  void MaybeWaitForFrame(const gfx::Size& size_in_dip);
+
   // Sets mouseDownCanMoveWindow on |bridged_view_| and triggers the NSWindow to
   // update its draggable region.
   void SetDraggable(bool draggable);
 
   // Overridden from CocoaMouseCaptureDelegate:
   void PostCapturedEvent(NSEvent* event) override;
   void OnMouseCaptureLost() override;
 
   // Returns a properties dictionary associated with the NSWindow.
   // Creates and attaches a new instance if not found.
@@ skipping 67 matching lines @@
   // If true, the window has been made visible or changed shape and the window
   // shadow needs to be invalidated when a frame is received for the new shape.
   bool invalidate_shadow_on_frame_swap_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(BridgedNativeWidget);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_COCOA_BRIDGED_NATIVE_WIDGET_H_