Add GL_EXT_multisampled_render_to_texture support to command buffer.

gpu/command_buffer/client/gles2_implementation_unittest_autogen.h

Index: gpu/command_buffer/client/gles2_implementation_unittest_autogen.h
diff --git a/gpu/command_buffer/client/gles2_implementation_unittest_autogen.h b/gpu/command_buffer/client/gles2_implementation_unittest_autogen.h
index a93f8eb9e563bed976cf5df4316b01b84d65c542..24d03dce6639cb86b13502ccb6e3f21ba5b0937c 100644
--- a/gpu/command_buffer/client/gles2_implementation_unittest_autogen.h
+++ b/gpu/command_buffer/client/gles2_implementation_unittest_autogen.h
@@ -1529,6 +1529,19 @@ TEST_F(GLES2ImplementationTest, RenderbufferStorageMultisampleEXT) {
   EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
 }
 
+TEST_F(GLES2ImplementationTest, FramebufferTexture2DMultisampleEXT) {
+  struct Cmds {
+    cmds::FramebufferTexture2DMultisampleEXT cmd;
+  };
+  Cmds expected;
+  expected.cmd.Init(
+      GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 4, 0, 6);
+
+  gl_->FramebufferTexture2DMultisampleEXT(
+      GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 4, 0, 6);
+  EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
+}
+
 TEST_F(GLES2ImplementationTest, TexStorage2DEXT) {
   struct Cmds {
     cmds::TexStorage2DEXT cmd;