Implement GetIntegerv(SAMPLER_BINDING/TRANSFORM_FEEDBACK_BINDING) in command buffer.

gpu/command_buffer/service/sampler_manager.cc

 // Copyright (c) 2015 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.
 
 #include "gpu/command_buffer/service/sampler_manager.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "gpu/command_buffer/common/gles2_cmd_format.h"
 #include "gpu/command_buffer/service/error_state.h"
@@ skipping 12 matching lines @@
       mag_filter(GL_LINEAR),
       wrap_r(GL_REPEAT),
       wrap_s(GL_REPEAT),
       wrap_t(GL_REPEAT),
       compare_func(GL_LEQUAL),
       compare_mode(GL_NONE),
       max_lod(1000.0f),
       min_lod(-1000.0f) {
 }
 
-Sampler::Sampler(SamplerManager* manager, GLuint service_id)
+Sampler::Sampler(SamplerManager* manager, GLuint client_id, GLuint service_id)
     : manager_(manager),
+      client_id_(client_id),
       service_id_(service_id),
       deleted_(false) {
   DCHECK(manager);
 }
 
 Sampler::~Sampler() {
   if (manager_->have_context_) {
     glDeleteSamplers(1, &service_id_);
   }
 }
@@ skipping 95 matching lines @@
   while (!samplers_.empty()) {
     Sampler* sampler = samplers_.begin()->second.get();
     sampler->MarkAsDeleted();
     samplers_.erase(samplers_.begin());
   }
 }
 
 Sampler* SamplerManager::CreateSampler(GLuint client_id, GLuint service_id) {
   DCHECK_NE(0u, service_id);
   auto result = samplers_.insert(std::make_pair(client_id,
-      scoped_refptr<Sampler>(new Sampler(this, service_id))));
+      scoped_refptr<Sampler>(new Sampler(this, client_id, service_id))));
   DCHECK(result.second);
   return result.first->second.get();
 }
 
 Sampler* SamplerManager::GetSampler(GLuint client_id) {
   SamplerMap::iterator it = samplers_.find(client_id);
   return it != samplers_.end() ? it->second.get() : nullptr;
 }
 
 void SamplerManager::RemoveSampler(GLuint client_id) {
@@ skipping 39 matching lines @@
       ERRORSTATE_SET_GL_ERROR_INVALID_PARAMI(
           error_state, result, function_name, pname, param);
     }
   } else {
     glSamplerParameterf(sampler->service_id(), pname, param);
   }
 }
 
 }  // namespace gles2
 }  // namespace gpu