Use SwapBuffersWithBounds on Chromecast

cc/output/gl_renderer.cc

 // Copyright 2010 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 "cc/output/gl_renderer.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 383 matching lines @@
   const auto& context_caps =
       output_surface_->context_provider()->ContextCapabilities();
   DCHECK(!context_caps.iosurface || context_caps.texture_rectangle);
 
   use_discard_framebuffer_ = context_caps.discard_framebuffer;
   use_sync_query_ = context_caps.sync_query;
   use_blend_equation_advanced_ = context_caps.blend_equation_advanced;
   use_blend_equation_advanced_coherent_ =
       context_caps.blend_equation_advanced_coherent;
   use_occlusion_query_ = context_caps.occlusion_query;
+  use_swap_with_bounds_ = context_caps.swap_buffers_with_bounds;
 
   InitializeSharedObjects();
 }
 
 GLRenderer::~GLRenderer() {
   CleanupSharedObjects();
 
   if (context_visibility_) {
     auto* context_provider = output_surface_->context_provider();
     auto* cache_controller = context_provider->CacheController();
@@ skipping 2232 matching lines @@
                   swap_buffer_rect_.width(), swap_buffer_rect_.height());
   } else {
     // Expand the swap rect to the full surface unless it's empty, and empty
     // swap is allowed.
     if (!swap_buffer_rect_.IsEmpty() || !allow_empty_swap_) {
       swap_buffer_rect_ = gfx::Rect(surface_size);
     }
     output_frame.sub_buffer_rect = swap_buffer_rect_;
   }
 
+  if (use_swap_with_bounds_) {
+    overlay_processor_->GetContentBounds(&output_frame.content_bounds);
+  }
+
   swapping_overlay_resources_.push_back(std::move(pending_overlay_resources_));
   pending_overlay_resources_.clear();
 
   output_surface_->SwapBuffers(std::move(output_frame));
 
   swap_buffer_rect_ = gfx::Rect();
 }
 
 void GLRenderer::SwapBuffersComplete() {
   if (settings_->release_overlay_resources_after_gpu_query) {
@@ skipping 860 matching lines @@
     return;
 
   // Report GPU overdraw as a percentage of |max_result|.
   TRACE_COUNTER1(
       TRACE_DISABLED_BY_DEFAULT("cc.debug.overdraw"), "GPU Overdraw",
       (std::accumulate(overdraw->begin(), overdraw->end(), 0) * 100) /
           max_result);
 }
 
 }  // namespace cc