Allow using a larger-than-necessary texture as cached render pass backing

cc/direct_renderer.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_DIRECT_RENDERER_H_
 #define CC_DIRECT_RENDERER_H_
 
 #include "base/basictypes.h"
 #include "cc/cc_export.h"
 #include "cc/renderer.h"
@@ skipping 26 matching lines @@
         const RenderPass* currentRenderPass;
         const ScopedResource* currentTexture;
 
         gfx::RectF rootDamageRect;
 
         gfx::Transform projectionMatrix;
         gfx::Transform windowMatrix;
         bool flippedY;
     };
 
+    void setEnlargePassTextureAmountForTesting(gfx::Vector2d amount);
+
 protected:
     DirectRenderer(RendererClient* client, ResourceProvider* resourceProvider);
 
     class CachedResource : public ScopedResource {
     public:
         static scoped_ptr<CachedResource> create(ResourceProvider* resourceProvider) {
           return make_scoped_ptr(new CachedResource(resourceProvider));
         }
         virtual ~CachedResource() {}
 
@@ skipping 38 matching lines @@
     virtual void finishDrawingFrame(DrawingFrame&) = 0;
     virtual void finishDrawingQuadList();
     virtual bool flippedFramebuffer() const = 0;
     virtual void ensureScissorTestEnabled() = 0;
     virtual void ensureScissorTestDisabled() = 0;
 
     ScopedPtrHashMap<RenderPass::Id, CachedResource> m_renderPassTextures;
     ResourceProvider* m_resourceProvider;
 
 private:
+
+    gfx::Vector2d m_enlargePassTextureAmount;
+
     DISALLOW_COPY_AND_ASSIGN(DirectRenderer);
 };
 
 }  // namespace cc
 
 #endif  // CC_DIRECT_RENDERER_H_