cc: Some more cleanup and removing TODOs for validating resources.

cc/layers/layer_impl.cc

 // Copyright 2012 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/layers/layer_impl.h"
 
 #include "base/json/json_reader.h"
 #include "base/strings/stringprintf.h"
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_argument.h"
@@ skipping 728 matching lines @@
     children_[i]->NoteLayerPropertyChangedForDescendantsInternal();
 }
 
 void LayerImpl::NoteLayerPropertyChangedForDescendants() {
   layer_tree_impl()->set_needs_update_draw_properties();
   for (size_t i = 0; i < children_.size(); ++i)
     children_[i]->NoteLayerPropertyChangedForDescendantsInternal();
   SetNeedsPushProperties();
 }
 
+#if DCHECK_IS_ON()
+// Verify that the resource id is valid.
+static ResourceProvider::ResourceId ValidateResource(
+    const ResourceProvider* provider,
+    ResourceProvider::ResourceId id) {
+  provider->ValidateResource(id);
+  return id;
+}
+#endif
+
+void LayerImpl::ValidateQuadResourcesInternal(DrawQuad* quad) const {
+#if DCHECK_IS_ON()
+  quad->IterateResources(
+      base::Bind(&ValidateResource, layer_tree_impl_->resource_provider()));
+#endif
+}
+
 const char* LayerImpl::LayerTypeAsString() const {
   return "cc::LayerImpl";
 }
 
 void LayerImpl::ResetAllChangeTrackingForSubtree() {
   layer_property_changed_ = false;
 
   update_rect_ = gfx::Rect();
   damage_rect_ = gfx::RectF();
 
@@ skipping 859 matching lines @@
   gfx::Transform scaled_draw_transform =
       draw_properties_.target_space_transform;
   scaled_draw_transform.Scale(SK_MScalar1 / scale, SK_MScalar1 / scale);
   gfx::Size scaled_content_bounds =
       gfx::ToCeiledSize(gfx::ScaleSize(content_bounds(), scale));
   return MathUtil::MapEnclosingClippedRect(scaled_draw_transform,
                                            gfx::Rect(scaled_content_bounds));
 }
 
 }  // namespace cc