cc::ResourcePool - Re-use larger resources for smaller requests

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 3434 matching lines @@
   gl_->DeleteFramebuffers(1, &temp_fbo);
 }
 
 void GLRenderer::ScheduleRenderPassDrawQuad(
     const CALayerOverlay* ca_layer_overlay) {
   DCHECK(ca_layer_overlay->rpdq);
 
   if (!overlay_resource_pool_) {
     overlay_resource_pool_ = ResourcePool::CreateForGpuMemoryBufferResources(
         resource_provider_, base::ThreadTaskRunnerHandle::Get().get(),
-        gfx::BufferUsage::SCANOUT, base::TimeDelta::FromSeconds(3));
+        gfx::BufferUsage::SCANOUT, base::TimeDelta::FromSeconds(3),
+        settings_->disallow_non_exact_resource_reuse);
   }
 
   Resource* resource = nullptr;
   gfx::RectF new_bounds;
   CopyRenderPassDrawQuadToOverlayResource(ca_layer_overlay, &resource,
                                           &new_bounds);
   if (!resource || !resource->id())
     return;
 
   pending_overlay_resources_.push_back(
@@ skipping 137 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