Add GL_EXT_multisampled_render_to_texture support to command buffer.

gpu/command_buffer/client/gles2_trace_implementation_autogen.h

Index: gpu/command_buffer/client/gles2_trace_implementation_autogen.h
diff --git a/gpu/command_buffer/client/gles2_trace_implementation_autogen.h b/gpu/command_buffer/client/gles2_trace_implementation_autogen.h
index 414ddf52fc0b961ea4bff37eb2821bf0b1203447..4f3ce31b88a1b1900d694c73ef4d5b5d910959ba 100644
--- a/gpu/command_buffer/client/gles2_trace_implementation_autogen.h
+++ b/gpu/command_buffer/client/gles2_trace_implementation_autogen.h
@@ -248,6 +248,9 @@ virtual void BlitFramebufferEXT(
 virtual void RenderbufferStorageMultisampleEXT(
     GLenum target, GLsizei samples, GLenum internalformat, GLsizei width,
     GLsizei height) OVERRIDE;
+virtual void FramebufferTexture2DMultisampleEXT(
+    GLenum target, GLenum attachment, GLenum textarget, GLuint texture,
+    GLint level, GLsizei samples) OVERRIDE;
 virtual void TexStorage2DEXT(
     GLenum target, GLsizei levels, GLenum internalFormat, GLsizei width,
     GLsizei height) OVERRIDE;