GLES2CmdDecoder should resize GLSurface using GLSurface::Resize

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 <IOSurface/IOSurface.h>
 #include <OpenGL/CGLRenderers.h>
 #include <OpenGL/CGLTypes.h>
@@ skipping 682 matching lines @@
   vsync_parameters_valid_ = (vsync_interval_ != base::TimeDelta());
 
   // Compute |vsync_timebase_| to be the first vsync after time zero.
   if (vsync_parameters_valid_) {
     vsync_timebase_ -=
         vsync_interval_ *
         ((vsync_timebase_ - base::TimeTicks()) / vsync_interval_);
   }
 }
 
-void ImageTransportSurfaceOverlayMac::OnResize(gfx::Size pixel_size,
-                                               float scale_factor) {
+bool ImageTransportSurfaceOverlayMac::Resize(const gfx::Size& pixel_size,
+                                             float scale_factor) {
   // Flush through any pending frames.
   DisplayAndClearAllPendingSwaps();
   pixel_size_ = pixel_size;
   scale_factor_ = scale_factor;
+  return true;
 }
 
 void ImageTransportSurfaceOverlayMac::SetLatencyInfo(
     const std::vector<ui::LatencyInfo>& latency_info) {
   latency_info_.insert(
       latency_info_.end(), latency_info.begin(), latency_info.end());
 }
 
 void ImageTransportSurfaceOverlayMac::OnGpuSwitched() {
   // Create a new context, and use the GL renderer ID that the new context gets.
@@ skipping 25 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