Enable SurfaceTexture based zero-copy texture uploading on Android platform

content/app/android/child_process_service.cc

 // Copyright (c) 2012 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/app/android/child_process_service.h"
 
 #include <android/native_window_jni.h>
 #include <cpu-features.h>
 
 #include "base/android/jni_array.h"
 #include "base/android/library_loader/library_loader_hooks.h"
 #include "base/android/memory_pressure_listener_android.h"
 #include "base/logging.h"
 #include "base/posix/global_descriptors.h"
 #include "content/child/child_thread.h"
 #include "content/common/android/surface_texture_peer.h"
+#include "content/common/gpu/client/gpu_memory_buffer_impl_surface_texture.h"
 #include "content/common/gpu/gpu_surface_lookup.h"
 #include "content/public/app/android_library_loader_hooks.h"
 #include "content/public/common/content_descriptors.h"
 #include "ipc/ipc_descriptors.h"
 #include "jni/ChildProcessService_jni.h"
 #include "ui/gl/android/scoped_java_surface.h"
 
 using base::android::AttachCurrentThread;
 using base::android::CheckException;
 using base::android::JavaIntArrayToIntVector;
@@ skipping 102 matching lines @@
 void ExitChildProcess(JNIEnv* env, jclass clazz) {
   VLOG(0) << "ChildProcessService: Exiting child process.";
   base::android::LibraryLoaderExitHook();
   _exit(0);
 }
 
 bool RegisterChildProcessService(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
+void SetupSurfaceTexture(JNIEnv* env,
+                         jclass clazz,
+                         jlong gpu_memory_buffer,
+                         jobject jsurface) {
+  ANativeWindow* window = NULL;
+  if (jsurface)
+    window = ANativeWindow_fromSurface(env, jsurface);

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

When would `window` be released?

+  GpuMemoryBufferImplSurfaceTexture* gpu_memory_buffer_handle =

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

Return as early as possible if window is NULL.

+      (GpuMemoryBufferImplSurfaceTexture*)(gpu_memory_buffer);
+  gpu_memory_buffer_handle->setNativeWindow(window);
+}
+
 void ShutdownMainThread(JNIEnv* env, jobject obj) {
   ChildThread::ShutdownThread();
 }
 
 }  // namespace content