Enable SurfaceTexture based zero-copy texture uploading on Android platform

ui/gl/gl_image_surface_texture.cc

Index: ui/gl/gl_image_surface_texture.cc
diff --git a/ui/gl/gl_image_surface_texture.cc b/ui/gl/gl_image_surface_texture.cc
new file mode 100644
index 0000000000000000000000000000000000000000..84feb8c6b931c9a34e3da15e04fdbf8b43649c39
--- /dev/null
+++ b/ui/gl/gl_image_surface_texture.cc
@@ -0,0 +1,48 @@
+// 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_surface_texture.h"
+
+#include "base/debug/trace_event.h"
+#include "base/process/process_handle.h"
+#include "ui/gl/gl_bindings.h"
+
+namespace gfx {
+
+GLImageSurfaceTexture::GLImageSurfaceTexture(gfx::Size size) : size_(size) {}
+
+GLImageSurfaceTexture::~GLImageSurfaceTexture() {
+  if (texture_id_)
+    glDeleteTextures(1, &texture_id_);
+  Destroy();
+}
+
+bool GLImageSurfaceTexture::Initialize(gfx::GpuMemoryBufferHandle buffer) {
+  gfx::SurfaceTexture* surface_texture =
+      reinterpret_cast<gfx::SurfaceTexture*>(buffer.surface_texture_handle);
+  surface_texture_ = surface_texture;
+  texture_id_ = buffer.texture_id;
+  surface_texture->Release();
+  return true;
+}
+
+void GLImageSurfaceTexture::Destroy() {}
+
+gfx::Size GLImageSurfaceTexture::GetSize() { return size_; }
+
+bool GLImageSurfaceTexture::BindTexImage(unsigned target) {
+  TRACE_EVENT0("gpu", "GLImageSurfaceTexture::BindTexImage");
+  return true;
+}
+
+void GLImageSurfaceTexture::ReleaseTexImage(unsigned target) {}
+
+void GLImageSurfaceTexture::WillUseTexImage() {
+  surface_texture_->UpdateTexImage();
+}
+
+void GLImageSurfaceTexture::DidUseTexImage() {}
+
+void GLImageSurfaceTexture::SetReleaseAfterUse() {}
+}  // namespace gfx