linux: implement gpu plugin

gpu/command_buffer/service/gpu_processor_linux.cc

Index: gpu/command_buffer/service/gpu_processor_linux.cc
diff --git a/gpu/command_buffer/service/gpu_processor_linux.cc b/gpu/command_buffer/service/gpu_processor_linux.cc
new file mode 100644
index 0000000000000000000000000000000000000000..205cceb115e12ceec4fb66528bc01316b07066cf
--- /dev/null
+++ b/gpu/command_buffer/service/gpu_processor_linux.cc
@@ -0,0 +1,50 @@
+// Copyright (c) 2009 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 <gdk/gdkx.h>
+#include "gpu/command_buffer/service/gpu_processor.h"
+#include "gpu/command_buffer/service/x_utils.h"
+
+using ::base::SharedMemory;
+
+namespace gpu {
+
+bool GPUProcessor::Initialize(gfx::PluginWindowHandle handle) {
+  DCHECK(handle);
+
+  // Cannot reinitialize.
+  if (decoder_->window() != NULL)
+    return false;
+
+  // Map the ring buffer and create the parser.
+  Buffer ring_buffer = command_buffer_->GetRingBuffer();
+  if (ring_buffer.ptr) {
+    parser_.reset(new CommandParser(ring_buffer.ptr,
+                                    ring_buffer.size,
+                                    0,
+                                    ring_buffer.size,
+                                    0,
+                                    decoder_.get()));
+  } else {
+    parser_.reset(new CommandParser(NULL, 0, 0, 0, 0,
+                                    decoder_.get()));
+  }
+
+  // Initialize GAPI immediately if the window handle is valid.
+  XWindowWrapper *window = new XWindowWrapper(GDK_DISPLAY(), handle);
+  decoder_->set_window_wrapper(window);
+  return decoder_->Initialize();
+}
+
+void GPUProcessor::Destroy() {
+  // Destroy GAPI if window handle has not already become invalid.
+  XWindowWrapper *window = decoder_->window();
+  if (window) {
+    decoder_->Destroy();
+    decoder_->set_window_wrapper(NULL);
+    delete window;
+  }
+}
+
+}  // namespace gpu