[cc] Evict UIResources when the renderer is not visible

cc/trees/layer_tree_impl.cc

 // Copyright 2011 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/trees/layer_tree_impl.h"
 
 #include "base/debug/trace_event.h"
 #include "cc/animation/keyframed_animation_curve.h"
 #include "cc/animation/scrollbar_animation_controller.h"
 #include "cc/debug/traced_value.h"
@@ skipping 611 matching lines @@
         layer_tree_host_impl_->CreateUIResource(req.id, req.bitmap);
         break;
       case UIResourceRequest::UIResourceDelete:
         layer_tree_host_impl_->DeleteUIResource(req.id);
         break;
       case UIResourceRequest::UIResourceInvalidRequest:
         NOTREACHED();
         break;
     }
   }
+
+  // If all UI resource evictions were not recreated by processing this queue,
+  // then another commit is required.
+  if (layer_tree_host_impl_->EvictedUIResourcesExist())
+    layer_tree_host_impl_->SetNeedsCommit();
 }
 
 void LayerTreeImpl::AddLayerWithCopyOutputRequest(LayerImpl* layer) {
   // Only the active tree needs to know about layers with copy requests, as
   // they are aborted if not serviced during draw.
   DCHECK(IsActiveTree());
 
   DCHECK(std::find(layers_with_copy_output_request_.begin(),
                    layers_with_copy_output_request_.end(),
                    layer) == layers_with_copy_output_request_.end());
@@ skipping 16 matching lines @@
 const std::vector<LayerImpl*> LayerTreeImpl::LayersWithCopyOutputRequest()
     const {
   // Only the active tree needs to know about layers with copy requests, as
   // they are aborted if not serviced during draw.
   DCHECK(IsActiveTree());
 
   return layers_with_copy_output_request_;
 }
 
 }  // namespace cc