Add support to send optimal format as part of ScheduleOverlayPlane

content/common/gpu/image_transport_surface_overlay_mac.mm

 // Copyright 2015 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/common/gpu/image_transport_surface_overlay_mac.h"
 
 #include <algorithm>
 #include <CoreGraphics/CoreGraphics.h>
 #include <IOSurface/IOSurface.h>
 #include <OpenGL/CGLRenderers.h>
@@ skipping 718 matching lines @@
   if (!allocated) {
     DisplayAndClearAllPendingSwaps();
     last_swap_time_ = base::TimeTicks();
   }
   return true;
 }
 
 bool ImageTransportSurfaceOverlayMac::ScheduleOverlayPlane(
     int z_order,
     gfx::OverlayTransform transform,
+    gfx::BufferFormat storage_format,
     gl::GLImage* image,
     const gfx::Rect& pixel_frame_rect,
-    const gfx::RectF& crop_rect) {
+    const gfx::RectF& crop_rect,
+    bool handle_scaling) {
   DCHECK_EQ(transform, gfx::OVERLAY_TRANSFORM_NONE);
   if (transform != gfx::OVERLAY_TRANSFORM_NONE)
     return false;
 
   linked_ptr<OverlayPlane> plane = OverlayPlane::CreateWithFrameRect(
       z_order, static_cast<gl::GLImageIOSurface*>(image)->io_surface_id().id,
       static_cast<gl::GLImageIOSurface*>(image)->io_surface(),
       gfx::RectF(pixel_frame_rect), crop_rect);
   if (z_order == 0)
     pending_root_plane_ = plane;
@@ skipping 99 matching lines @@
   // Compute the previous vsync time.
   base::TimeTicks previous_vsync =
       vsync_interval_ * ((from - vsync_timebase_) / vsync_interval_) +
       vsync_timebase_;
 
   // Return |interval_fraction| through the next vsync.
   return previous_vsync + (1 + interval_fraction) * vsync_interval_;
 }
 
 }  // namespace content