command_buffer: Implement EXT_blend_func_extended

mojo/gpu/mojo_gles2_impl_autogen.h

Index: mojo/gpu/mojo_gles2_impl_autogen.h
diff --git a/mojo/gpu/mojo_gles2_impl_autogen.h b/mojo/gpu/mojo_gles2_impl_autogen.h
index c5e91b096197badf18009feb733c681a440d5438..ba433f9e2e658ea67a05181ca89de4bdeda6ffec 100644
--- a/mojo/gpu/mojo_gles2_impl_autogen.h
+++ b/mojo/gpu/mojo_gles2_impl_autogen.h
@@ -877,6 +877,14 @@ class MojoGLES2Impl : public gpu::gles2::GLES2Interface {
   GLenum GetGraphicsResetStatusKHR() override;
   void BlendBarrierKHR() override;
   void ApplyScreenSpaceAntialiasingCHROMIUM() override;
+  void BindFragDataLocationIndexedEXT(GLuint program,
+                                      GLuint colorNumber,
+                                      GLuint index,
+                                      const char* name) override;
+  void BindFragDataLocationEXT(GLuint program,
+                               GLuint colorNumber,
+                               const char* name) override;
+  GLint GetFragDataIndexEXT(GLuint program, const char* name) override;
 
  private:
   MojoGLES2Context context_;