Move WakeUpGpu logic to GpuChannelManager

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 692 matching lines @@
   pixel_size_ = pixel_size;
   scale_factor_ = scale_factor;
 }
 
 void ImageTransportSurfaceOverlayMac::SetLatencyInfo(
     const std::vector<ui::LatencyInfo>& latency_info) {
   latency_info_.insert(
       latency_info_.end(), latency_info.begin(), latency_info.end());
 }
 
-void ImageTransportSurfaceOverlayMac::WakeUpGpu() {}
-
 void ImageTransportSurfaceOverlayMac::OnGpuSwitched() {
   // Create a new context, and use the GL renderer ID that the new context gets.
   scoped_refptr<ui::IOSurfaceContext> context_on_new_gpu =
       ui::IOSurfaceContext::Get(ui::IOSurfaceContext::kCALayerContext);
   if (!context_on_new_gpu)
     return;
   GLint context_renderer_id = -1;
   if (CGLGetParameter(context_on_new_gpu->cgl_context(),
                       kCGLCPCurrentRendererID,
                       &context_renderer_id) != kCGLNoError) {
@@ skipping 17 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