Enable SurfaceTexture based zero-copy texture uploading on Android platform

content/common/gpu/surface_texture_bridge_android.cc

+// 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 "content/common/gpu/surface_texture_bridge_android.h"
+
+#include "base/bind.h"
+#include "content/browser/android/child_process_launcher_android.h"
+#include "content/common/android/surface_texture_peer.h"
+#include "content/common/gpu/gpu_channel.h"
+#include "content/common/gpu/gpu_messages.h"
+#include "gpu/command_buffer/service/context_group.h"
+#include "gpu/command_buffer/service/context_state.h"
+#include "gpu/command_buffer/service/gles2_cmd_decoder.h"
+#include "gpu/command_buffer/service/texture_manager.h"
+#include "ui/gfx/size.h"
+#include "ui/gl/scoped_make_current.h"
+
+namespace content {
+
+using gpu::gles2::GLES2Decoder;

[Hongbo Min, 2014/03/18 06:10:03]

You may want to remove these 3 unused 'using' stmt.

+using gpu::gles2::TextureManager;
+using gpu::gles2::TextureRef;
+
+// static
+gfx::SurfaceTexture* SurfaceTextureBridge::CreateSurfaceTexture(
+    GpuCommandBufferStub* owner_stub,
+    uint32* gpu_texture_id) {
+  unsigned int texture_id = 0;
+  glGenTextures(1, &texture_id);
+  *gpu_texture_id = texture_id;
+  return new gfx::SurfaceTexture(texture_id);
+}
+
+// static
+bool SurfaceTextureBridge::SetupSurfaceTexturePeer(
+    GpuCommandBufferStub* owner_stub,
+    void* gpu_memory_buffer,
+    gfx::SurfaceTexture* surface_texture) {
+  if (!owner_stub)
+    return false;
+
+  base::ProcessHandle process = owner_stub->channel()->renderer_pid();
+  scoped_refptr<gfx::SurfaceTexture> scoped_surface_texture(surface_texture);
+  SetupSurfaceTextureToRenderer(
+      process, gpu_memory_buffer, scoped_surface_texture);
+  return true;
+}
+
+}  // namespace content