cc: Be robust against invalid RenderPassDrawQuads.

cc/layers/delegated_renderer_layer_impl.h

 // 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.
 
 #ifndef CC_LAYERS_DELEGATED_RENDERER_LAYER_IMPL_H_
 #define CC_LAYERS_DELEGATED_RENDERER_LAYER_IMPL_H_
 
 #include "base/containers/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
@@ skipping 53 matching lines @@
   void CreateChildIdIfNeeded();
   void ClearChildId();
 
   void AppendRainbowDebugBorder(QuadSink* quad_sink,
                                 AppendQuadsData* append_quads_data);
 
   void SetRenderPasses(
       ScopedPtrVector<RenderPass>* render_passes_in_draw_order);
   void ClearRenderPasses();
 
-  RenderPass::Id ConvertDelegatedRenderPassId(
-      RenderPass::Id delegated_render_pass_id) const;
+  bool ConvertDelegatedRenderPassId(
+      RenderPass::Id delegated_render_pass_id,
+      RenderPass::Id* output_render_pass_id) const;
 
   gfx::Transform DelegatedFrameToLayerSpaceTransform(gfx::Size frame_size)
       const;
 
   void AppendRenderPassQuads(
       QuadSink* quad_sink,
       AppendQuadsData* append_quads_data,
       const RenderPass* delegated_render_pass,
       gfx::Size frame_size) const;
 
   // LayerImpl overrides.
   virtual const char* LayerTypeAsString() const OVERRIDE;
 
   bool have_render_passes_to_push_;
   ScopedPtrVector<RenderPass> render_passes_in_draw_order_;
   base::hash_map<RenderPass::Id, int> render_passes_index_by_id_;
   ResourceProvider::ResourceIdSet resources_;
 
   gfx::Size display_size_;
   int child_id_;
   bool own_child_id_;
 
   DISALLOW_COPY_AND_ASSIGN(DelegatedRendererLayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_DELEGATED_RENDERER_LAYER_IMPL_H_