Expire resources in ResourcePool after non-use

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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/renderer/gpu/render_widget_compositor.h"
 
 #include <limits>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 357 matching lines @@
         *cmd,
         cc::switches::kSlowDownRasterScaleFactor,
         kMinSlowDownScaleFactor,
         kMaxSlowDownScaleFactor,
         &settings.initial_debug_state.slow_down_raster_scale_factor);
   }
 
   settings.invert_viewport_scroll_order =
       cmd->HasSwitch(switches::kInvertViewportScrollOrder);
 
-  if (cmd->HasSwitch(cc::switches::kMaxUnusedResourceMemoryUsagePercentage)) {
-    int max_unused_resource_memory_percentage;
-    if (GetSwitchValueAsInt(
-            *cmd,
-            cc::switches::kMaxUnusedResourceMemoryUsagePercentage,
-            0, 100,
-            &max_unused_resource_memory_percentage)) {
-      settings.max_unused_resource_memory_percentage =
-          max_unused_resource_memory_percentage;
-    }
-  }
-
   settings.strict_layer_property_change_checking =
       cmd->HasSwitch(cc::switches::kStrictLayerPropertyChangeChecking);
 
 #if defined(OS_ANDROID)
   SynchronousCompositorFactory* synchronous_compositor_factory =
       SynchronousCompositorFactory::GetInstance();
 
   // We can't use GPU rasterization on low-end devices, because the Ganesh
   // cache would consume too much memory.
   if (base::SysInfo::IsLowEndDevice())
@@ skipping 655 matching lines @@
     return;
   provider->ContextGL()->RateLimitOffscreenContextCHROMIUM();
 }
 
 void RenderWidgetCompositor::SetSurfaceIdNamespace(
     uint32_t surface_id_namespace) {
   layer_tree_host_->set_surface_id_namespace(surface_id_namespace);
 }
 
 }  // namespace content