Add subscribeUniform extension pipeline

gpu/command_buffer/service/uniform_subscription_manager.cc

Index: gpu/command_buffer/service/uniform_subscription_manager.cc
diff --git a/gpu/command_buffer/service/uniform_subscription_manager.cc b/gpu/command_buffer/service/uniform_subscription_manager.cc
new file mode 100644
index 0000000000000000000000000000000000000000..306c0ec21037e78fb6f13eb3728fc31eaa4070f6
--- /dev/null
+++ b/gpu/command_buffer/service/uniform_subscription_manager.cc
@@ -0,0 +1,55 @@
+// Copyright (c) 2014 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/uniform_subscription_manager.h"
+
+namespace gpu {
+namespace gles2 {
+
+UniformSubscriptionManager::UniformSubscriptionManager() {
+}
+
+UniformSubscriptionManager::~UniformSubscriptionManager() {
+  DCHECK(subscriptions_.empty());
+}
+
+void UniformSubscriptionManager::Destroy(bool have_context) {
+  subscriptions_.clear();
+}
+
+void UniformSubscriptionManager::AddSubscription(GLuint client_id,
+                                                 GLint location,
+                                                 GLenum target) {
+  if (subscriptions_.find(client_id) != subscriptions_.end()) {
+    subscriptions_.insert(std::make_pair(client_id, ProgramSubscriptions()));
+  }
+  subscriptions_[client_id].push_back(std::make_pair(target, location));
+}
+
+void UniformSubscriptionManager::ActivateUniformSubscriptionState() {
+  // TODO(orglofch)
+}
+
+const UniformSubscriptionManager::ProgramSubscriptions*
+UniformSubscriptionManager::SubscriptionsForProgram(GLuint client_id) {
+  SubscriptionMap::iterator it = subscriptions_.find(client_id);
+  if (it != subscriptions_.end()) {
+    return &it->second;
+  } else {
+    return NULL;
+  }
+}
+
+Program::UniformApiType UniformSubscriptionManager::ApiTypeForTarget(
+    GLenum target) {
+  switch (target) {
+    case GL_MOUSE_POSITION:
+      return Program::kUniform2i;
+  }
+  NOTREACHED() << "Unhandled uniform subscription target " << target;
+  return Program::kUniformNone;
+}
+
+}  // namespace gles2
+}  // namespace gpu