Redirect Skia/Ganesh GL calls to Mesa during the layout tests.

app/gfx/gl/gl_interface.h

 // Copyright (c) 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.
 
 // This file implements glue to a GL interface so we can mock it for unit
 // testing. It has to be Desktop GL, not GLES2 as it is used to test the service
 // side code.
 
 #ifndef APP_GFX_GL_GL_INTERFACE_H_
 #define APP_GFX_GL_GL_INTERFACE_H_
@@ skipping 243 matching lines @@
   virtual GLboolean IsFramebufferEXT(GLuint framebuffer) = 0;
 
   virtual GLboolean IsProgram(GLuint program) = 0;
 
   virtual GLboolean IsRenderbufferEXT(GLuint renderbuffer) = 0;
 
   virtual GLboolean IsShader(GLuint shader) = 0;
 
   virtual GLboolean IsTexture(GLuint texture) = 0;
 
+  virtual void* MapBuffer(GLenum target, GLenum access) = 0;
+
   virtual void LineWidth(GLfloat width) = 0;
 
   virtual void LinkProgram(GLuint program) = 0;
 
   virtual void PixelStorei(GLenum pname, GLint param) = 0;
 
   virtual void PolygonOffset(GLfloat factor, GLfloat units) = 0;
 
   virtual void ReadPixels(
       GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
@@ skipping 96 matching lines @@
       const GLfloat* value) = 0;
 
   virtual void UniformMatrix3fv(
       GLint location, GLsizei count, GLboolean transpose,
       const GLfloat* value) = 0;
 
   virtual void UniformMatrix4fv(
       GLint location, GLsizei count, GLboolean transpose,
       const GLfloat* value) = 0;
 
+  virtual GLboolean UnmapBuffer(GLenum target) = 0;
+
   virtual void UseProgram(GLuint program) = 0;
 
   virtual void ValidateProgram(GLuint program) = 0;
 
   virtual void VertexAttrib1f(GLuint indx, GLfloat x) = 0;
 
   virtual void VertexAttrib1fv(GLuint indx, const GLfloat* values) = 0;
 
   virtual void VertexAttrib2f(GLuint indx, GLfloat x, GLfloat y) = 0;
 
@@ skipping 33 matching lines @@
 
   virtual void GetFenceivNV(GLuint fence, GLenum pname, GLint *params) = 0;
 
  private:
   static GLInterface* interface_;
 };
 
 }  // namespace gfx
 
 #endif  // APP_GFX_GL_GL_INTERFACE_H_