cc: Add a pixel test for background blur outsets.

cc/output/gl_renderer.h

 // Copyright 2010 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_OUTPUT_GL_RENDERER_H_
 #define CC_OUTPUT_GL_RENDERER_H_
 
 #include "cc/base/cc_export.h"
 #include "cc/output/direct_renderer.h"
 #include "cc/output/gl_renderer_draw_cache.h"
@@ skipping 137 matching lines @@
   void DrawPictureQuad(const DrawingFrame* frame,
                        const PictureDrawQuad* quad);
 
   void SetShaderOpacity(float opacity, int alpha_location);
   void SetShaderQuadF(const gfx::QuadF& quad, int quad_location);
   void DrawQuadGeometry(const DrawingFrame* frame,
                         const gfx::Transform& draw_transform,
                         const gfx::RectF& quad_rect,
                         int matrix_location);
   void SetBlendEnabled(bool enabled);
+  bool blend_enabled() const { return blend_shadow_; }
   void SetUseProgram(unsigned program);
 
   void CopyTextureToFramebuffer(const DrawingFrame* frame,
                                 int texture_id,
                                 gfx::Rect rect,
                                 const gfx::Transform& draw_matrix);
 
   // Check if quad needs antialiasing and if so, inflate the quad and
   // fill edge array for fragment shader.  local_quad is set to
   // inflated quad if antialiasing is required, otherwise it is left
@@ skipping 197 matching lines @@
 #if DEBUG_GL_CALLS && !defined(NDEBUG)
 #define GLC(context, x)                                                        \
   (x, GLRenderer::DebugGLCall(&* context, #x, __FILE__, __LINE__))
 #else
 #define GLC(context, x) (x)
 #endif
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_GL_RENDERER_H_