GPU client side changes for GpuMemoryBuffers

gpu/command_buffer/client/gpu_memory_buffer_tracker.cc

Index: gpu/command_buffer/client/gpu_memory_buffer_tracker.cc
diff --git a/gpu/command_buffer/client/gpu_memory_buffer_tracker.cc b/gpu/command_buffer/client/gpu_memory_buffer_tracker.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6ad0df385fae0703551b58dc2444f7f091f258e8
--- /dev/null
+++ b/gpu/command_buffer/client/gpu_memory_buffer_tracker.cc
@@ -0,0 +1,51 @@
+// Copyright (c) 2013 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 "../client/gpu_memory_buffer_tracker.h"
+
+#include "../client/gpu_memory_buffer_factory.h"
+
+namespace gpu {
+namespace gles2 {
+
+GpuMemoryBufferTracker::GpuMemoryBufferTracker()
+    : buffers_() {
+}
+
+GpuMemoryBufferTracker::~GpuMemoryBufferTracker() {
+  while (!buffers_.empty()) {
+    RemoveBuffer(buffers_.begin()->first);
+  }
+}
+
+GpuMemoryBuffer* GpuMemoryBufferTracker::CreateBuffer(
+    GLuint id, GLsizei width, GLsizei height) {
+  GPU_DCHECK_NE(0u, id);
+  GpuMemoryBuffer* buffer =
+      GetProcessDefaultGpuMemoryBufferFactory().Run(
+          id, width, height).release();
+
+  std::pair<BufferMap::iterator, bool> result =
+      buffers_.insert(std::make_pair(id, buffer));
+  GPU_DCHECK(result.second);
+
+  return buffer;
+}
+
+GpuMemoryBuffer* GpuMemoryBufferTracker::GetBuffer(GLuint client_id) {
+  BufferMap::iterator it = buffers_.find(client_id);
+  return (it != buffers_.end()) ? it->second : NULL;
+}
+
+void GpuMemoryBufferTracker::RemoveBuffer(GLuint client_id) {
+  BufferMap::iterator buffer_it = buffers_.find(client_id);
+  if (buffer_it != buffers_.end()) {
+    GpuMemoryBuffer* buffer = buffer_it->second;
+    buffers_.erase(buffer_it);
+    delete buffer;
+  }
+}
+
+}  // namespace gles2
+}  // namespace gpu