Enable SurfaceTexture based zero-copy texture uploading on Android platform

content/browser/android/child_process_launcher_android.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/browser/android/child_process_launcher_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 141 matching lines @@
 }
 
 jobject GetViewSurface(JNIEnv* env, jclass clazz, jint surface_id) {
   // This is a synchronous call from the GPU process and is expected to be
   // handled on a binder thread. Handling this on the UI thread will lead
   // to deadlocks.
   DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::UI));
   return CompositorImpl::GetSurface(surface_id);
 }
 
+void SetupSurfaceTextureToRenderer(
+    base::ProcessHandle process,
+    void* gpu_memory_buffer,
+    scoped_refptr<gfx::SurfaceTexture> surface_texture) {
+  JNIEnv* env = AttachCurrentThread();
+  DCHECK(env);
+  gfx::ScopedJavaSurface surface(surface_texture.get());

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

Is it safe that the Surface is released  after exiting this function scope?

+  Java_ChildProcessLauncher_setupSurfaceTextureToRenderer(
+      env,
+      static_cast<jint>(process),
+      reinterpret_cast<intptr_t>(gpu_memory_buffer),
+      surface.j_surface().obj());
+}
+
 jboolean IsSingleProcess(JNIEnv* env, jclass clazz) {
   return CommandLine::ForCurrentProcess()->HasSwitch(switches::kSingleProcess);
 }
 
 bool RegisterChildProcessLauncher(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace content