Implement GL_EXT_debug_marker

gpu/command_buffer/common/debug_marker_manager.cc

Index: gpu/command_buffer/common/debug_marker_manager.cc
diff --git a/gpu/command_buffer/common/debug_marker_manager.cc b/gpu/command_buffer/common/debug_marker_manager.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f0127d521c191157edc17c01e1bf96148d63fe04
--- /dev/null
+++ b/gpu/command_buffer/common/debug_marker_manager.cc
@@ -0,0 +1,51 @@
+// Copyright (c) 2012 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/common/debug_marker_manager.h"
+
+namespace gpu {
+namespace gles2 {
+
+DebugMarkerManager::Group::Group(const std::string& name)
+    : name_(name),
+      marker_(name) {
+}
+
+DebugMarkerManager::Group::~Group() {
+}
+
+void DebugMarkerManager::Group::SetMarker(const std::string& marker) {
+  marker_ = name_ + "." + marker;
+}
+
+DebugMarkerManager::DebugMarkerManager() {
+  // Push root group.
+  group_stack_.push(Group(std::string("")));
+};
+
+DebugMarkerManager::~DebugMarkerManager() {
+}
+
+void DebugMarkerManager::SetMarker(const std::string& marker) {
+  group_stack_.top().SetMarker(marker);
+}
+
+const std::string& DebugMarkerManager::GetMarker() const {
+  return group_stack_.top().marker();
+}
+
+void DebugMarkerManager::PushGroup(const std::string& name) {
+  group_stack_.push(Group(group_stack_.top().name() + "." + name));
+}
+
+void DebugMarkerManager::PopGroup(void) {
+  if (group_stack_.size() > 1) {
+    group_stack_.pop();
+  }
+}
+
+}  // namespace gles2
+}  // namespace gpu
+
+