Pass responsibility for IOSurface-texture reuse to the gpu process.

gpu/ipc/service/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 "gpu/ipc/service/image_transport_surface_overlay_mac.h"
 
 #include <CoreGraphics/CoreGraphics.h>
 #include <IOSurface/IOSurface.h>
 #include <OpenGL/CGLRenderers.h>
 #include <OpenGL/CGLTypes.h>
@@ skipping 141 matching lines @@
   params.fullscreen_low_power_ca_context_valid =
       fullscreen_low_power_ca_context_valid;
   params.fullscreen_low_power_ca_context_id =
       fullscreen_low_power_ca_context_id;
   params.io_surface = io_surface;
   params.pixel_size = size;
   params.scale_factor = scale_factor;
   params.latency_info = std::move(latency_info);
   params.result = gfx::SwapResult::SWAP_ACK;
 
-  // TODO(erikchen): Re-enable this logic alongside the client code that
-  // consumes this response. https://crbug.com/608026.
-  // for (auto& query : io_surface_in_use_queries_) {
-  //   SwapBuffersCompletedIOSurfaceInUseQuery response;
-  //   response.texture = query.texture;
-  //   response.in_use =
-  //       query.io_surface.get() && IOSurfaceIsInUse(query.io_surface.get());
-  //   params.in_use_queries.push_back(std::move(response));
-  // }
+  for (auto& query : io_surface_in_use_queries_) {
+    gpu::TextureInUseResponse response;
+    response.texture = query.texture;
+    response.in_use =
+        query.io_surface.get() && IOSurfaceIsInUse(query.io_surface.get());
+    params.in_use_responses.push_back(std::move(response));
+  }
   io_surface_in_use_queries_.clear();
 
   stub_->SendSwapBuffersCompleted(params);
 }
 
 gfx::SwapResult ImageTransportSurfaceOverlayMac::SwapBuffersInternal(
     const gfx::Rect& pixel_damage_rect) {
   TRACE_EVENT0("gpu", "ImageTransportSurfaceOverlayMac::SwapBuffersInternal");
 
   // If supported, use GLFence to ensure that we haven't gotten more than one
@@ skipping 219 matching lines @@
 ImageTransportSurfaceOverlayMac::IOSurfaceInUseQuery::IOSurfaceInUseQuery() =
     default;
 ImageTransportSurfaceOverlayMac::IOSurfaceInUseQuery::IOSurfaceInUseQuery(
     const IOSurfaceInUseQuery&) = default;
 ImageTransportSurfaceOverlayMac::IOSurfaceInUseQuery::IOSurfaceInUseQuery(
     IOSurfaceInUseQuery&&) = default;
 ImageTransportSurfaceOverlayMac::IOSurfaceInUseQuery::~IOSurfaceInUseQuery() =
     default;
 
 }  // namespace gpu