gpu: Remove Create/DeleteImage IPC by adding an X11_PIXMAP_BUFFER GpuMemoryBuffer type.

ui/gl/gl_image_shared_memory.cc

+// Copyright 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 "ui/gl/gl_image_shared_memory.h"
+
+#include "base/logging.h"
+#include "base/process/process_handle.h"
+
+namespace gfx {
+
+GLImageSharedMemory::GLImageSharedMemory(const gfx::Size& size,
+                                         unsigned internalformat)
+    : GLImageMemory(size, internalformat) {
+}
+
+GLImageSharedMemory::~GLImageSharedMemory() {
+  Destroy();
+}
+
+bool GLImageSharedMemory::Initialize(const gfx::GpuMemoryBufferHandle& handle) {
+  if (!HasValidFormat())
+    return false;
+
+  if (!base::SharedMemory::IsHandleValid(handle.handle))
+    return false;
+
+  base::SharedMemory shared_memory(handle.handle, true);
+
+  // Duplicate the handle.
+  base::SharedMemoryHandle duped_shared_memory_handle;
+  if (!shared_memory.ShareToProcess(base::GetCurrentProcessHandle(),
+                                    &duped_shared_memory_handle)) {
+    DVLOG(0) << "Failed to duplicate shared memory handle.";
+    return false;
+  }
+
+  scoped_ptr<base::SharedMemory> duped_shared_memory(
+      new base::SharedMemory(duped_shared_memory_handle, true));
+
+  if (!duped_shared_memory->Map(Bytes())) {
+    DVLOG(0) << "Failed to map shared memory.";
+    return false;
+  }
+
+  DCHECK(!shared_memory_);
+  shared_memory_ = duped_shared_memory.Pass();
+  GLImageMemory::Initialize(
+      static_cast<unsigned char*>(shared_memory_->memory()));
+  return true;
+}
+
+void GLImageSharedMemory::Destroy() {
+  GLImageMemory::Destroy();
+  shared_memory_.reset();
+}
+
+}  // namespace gfx