Add glUniformBlockBinding to GPU command buffer.

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index 886d6e4c2d171637ba4b546b135c5de3e43bd1a9..706b0a7f24b8f49b4cf303a83593032ed7f19c22 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -9740,7 +9740,7 @@ error::Error GLES2DecoderImpl::HandleGetActiveUniformBlockiv(
   GLuint index = static_cast<GLuint>(c.index);
   GLenum pname = static_cast<GLenum>(c.pname);
   Program* program = GetProgramInfoNotShader(
-      program_id, "glGetActiveUniform");
+      program_id, "glGetActiveUniformBlockiv");
   if (!program) {
     return error::kNoError;
   }
@@ -11829,6 +11829,25 @@ error::Error GLES2DecoderImpl::HandleWaitAllAsyncTexImage2DCHROMIUM(
   return error::kNoError;
 }
 
+error::Error GLES2DecoderImpl::HandleUniformBlockBinding(
+    uint32_t immediate_data_size, const void* cmd_data) {
+  if (!unsafe_es3_apis_enabled())
+    return error::kUnknownCommand;
+  const gles2::cmds::UniformBlockBinding& c =
+      *static_cast<const gles2::cmds::UniformBlockBinding*>(cmd_data);
+  GLuint client_id = c.program;
+  GLuint index = static_cast<GLuint>(c.index);
+  GLuint binding = static_cast<GLuint>(c.binding);
+  Program* program = GetProgramInfoNotShader(
+      client_id, "glUniformBlockBinding");
+  if (!program) {
+    return error::kNoError;
+  }
+  GLuint service_id = program->service_id();
+  glUniformBlockBinding(service_id, index, binding);
+  return error::kNoError;
+}
+
 void GLES2DecoderImpl::OnTextureRefDetachedFromFramebuffer(
     TextureRef* texture_ref) {
   Texture* texture = texture_ref->texture();