This is initial API support required for enabling SurfaceTexture backed zero-copy for Android

ui/gl/android/surface_texture.cc

Index: ui/gl/android/surface_texture.cc
diff --git a/ui/gl/android/surface_texture.cc b/ui/gl/android/surface_texture.cc
index 35f9b47288b6deb3ac9e865e826bed9edef872a2..3f622870ca49a3f4b05db6225da82f6b01e6fa1a 100644
--- a/ui/gl/android/surface_texture.cc
+++ b/ui/gl/android/surface_texture.cc
@@ -26,10 +26,10 @@ bool GlContextMethodsAvailable() {
 
 namespace gfx {
 
-SurfaceTexture::SurfaceTexture(int texture_id) {
+SurfaceTexture::SurfaceTexture(int texture_id, bool single_buffer_mode) {
   JNIEnv* env = base::android::AttachCurrentThread();
-  j_surface_texture_.Reset(
-      Java_SurfaceTexturePlatformWrapper_create(env, texture_id));
+  j_surface_texture_.Reset(Java_SurfaceTexturePlatformWrapper_create(
+      env, texture_id, single_buffer_mode));
 }
 
 SurfaceTexture::~SurfaceTexture() {
@@ -52,6 +52,12 @@ void SurfaceTexture::UpdateTexImage() {
                                                     j_surface_texture_.obj());
 }
 
+void SurfaceTexture::ReleaseTexImage() {

[bulach, 2014/03/10 12:32:31]

should this be protected by base::android::BuildInfo::GetInstance()->sdk_int()
check?

[reveman, 2014/03/10 13:33:05]

I'd prefer DCHECK(single_buffer_mode_)

+  JNIEnv* env = base::android::AttachCurrentThread();
+  Java_SurfaceTexturePlatformWrapper_releaseTexImage(env,
+                                                     j_surface_texture_.obj());
+}
+
 void SurfaceTexture::GetTransformMatrix(float mtx[16]) {
   JNIEnv* env = base::android::AttachCurrentThread();