ui: Use single buffer SurfaceTexture mode for native GpuMemoryBuffers on 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 232705d6fab026478029d1b647ed10b49a0ccc5e..4a48452f77cc74c7a06a032762b956b005cee435 100644
--- a/ui/gl/android/surface_texture.cc
+++ b/ui/gl/android/surface_texture.cc
@@ -6,6 +6,7 @@
 
 #include <android/native_window_jni.h>
 
+#include "base/android/build_info.h"
 #include "base/android/jni_android.h"
 #include "base/logging.h"
 #include "jni/SurfaceTexturePlatformWrapper_jni.h"
@@ -21,6 +22,14 @@ scoped_refptr<SurfaceTexture> SurfaceTexture::Create(int texture_id) {
       Java_SurfaceTexturePlatformWrapper_create(env, texture_id));
 }
 
+scoped_refptr<SurfaceTexture> SurfaceTexture::CreateSingleBuffered(
+    int texture_id) {
+  DCHECK(IsSingleBufferModeSupported());
+  JNIEnv* env = base::android::AttachCurrentThread();
+  return new SurfaceTexture(
+      Java_SurfaceTexturePlatformWrapper_createSingleBuffered(env, texture_id));
+}
+
 SurfaceTexture::SurfaceTexture(
     const base::android::ScopedJavaLocalRef<jobject>& j_surface_texture) {
   j_surface_texture_.Reset(j_surface_texture);
@@ -46,6 +55,13 @@ void SurfaceTexture::UpdateTexImage() {
                                                     j_surface_texture_.obj());
 }
 
+void SurfaceTexture::ReleaseTexImage() {
+  DCHECK(IsSingleBufferModeSupported());
+  JNIEnv* env = base::android::AttachCurrentThread();
+  Java_SurfaceTexturePlatformWrapper_releaseTexImage(env,
+                                                     j_surface_texture_.obj());
+}
+
 void SurfaceTexture::GetTransformMatrix(float mtx[16]) {
   JNIEnv* env = base::android::AttachCurrentThread();
 
@@ -89,6 +105,11 @@ ANativeWindow* SurfaceTexture::CreateSurface() {
   return native_window;
 }
 
+// static
+bool SurfaceTexture::IsSingleBufferModeSupported() {
+  return base::android::BuildInfo::GetInstance()->sdk_int() >= 19;
+}
+
 bool SurfaceTexture::RegisterSurfaceTexture(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }