Introduce facade for interaction with Android SurfaceTexture.

ui/android/java/src/org/chromium/ui/gfx/SurfaceTextureBridge.java

Index: ui/android/java/src/org/chromium/ui/gfx/SurfaceTextureBridge.java
diff --git a/ui/android/java/src/org/chromium/ui/gfx/SurfaceTextureBridge.java b/ui/android/java/src/org/chromium/ui/gfx/SurfaceTextureBridge.java
new file mode 100644
index 0000000000000000000000000000000000000000..831830f8e7770a681f12909227eb07bbfd6121b7
--- /dev/null
+++ b/ui/android/java/src/org/chromium/ui/gfx/SurfaceTextureBridge.java
@@ -0,0 +1,64 @@
+// Copyright (c) 2013 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.
+
+package org.chromium.ui.gfx;
+
+import android.graphics.SurfaceTexture;
+import android.os.Build;
+
+import org.chromium.base.CalledByNative;
+import org.chromium.base.JNINamespace;
+
+/**
+ * Wrapper class for the underlying platform's SurfaceTexture in order to
+ * provide a stable JNI API.
+ */
+@JNINamespace("gfx")
+class SurfaceTextureBridge {
+    @CalledByNative
+    private static SurfaceTexture create(int textureId) {
+        return new SurfaceTexture(textureId);
+    }
+
+    @CalledByNative
+    private static void destroy(SurfaceTexture surfaceTexture) {
+        surfaceTexture.setOnFrameAvailableListener(null);
+        surfaceTexture.release();
+    }
+
+    @CalledByNative
+    private static void setFrameAvailableCallback(SurfaceTexture surfaceTexture,
+            int nativeSurfaceTextureListener) {
+       surfaceTexture.setOnFrameAvailableListener(
+               new SurfaceTextureListener(nativeSurfaceTextureListener));
+    }
+
+    @CalledByNative
+    private static void updateTexImage(SurfaceTexture surfaceTexture) {
+        surfaceTexture.updateTexImage();
+    }
+
+    @CalledByNative
+    private static void setDefaultBufferSize(SurfaceTexture surfaceTexture, int width,
+            int height) {
+        surfaceTexture.setDefaultBufferSize(width, height);
+    }
+
+    @CalledByNative
+    private static void getTransformMatrix(SurfaceTexture surfaceTexture, float[] matrix) {
+        surfaceTexture.getTransformMatrix(matrix);
+    }
+
+    @CalledByNative
+    private static void attachToGLContext(SurfaceTexture surfaceTexture, int texName) {
+        assert Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN;
+        surfaceTexture.attachToGLContext(texName);
+    }
+
+    @CalledByNative
+    private static void detachFromGLContext(SurfaceTexture surfaceTexture) {
+        assert Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN;
+        surfaceTexture.detachFromGLContext();
+    }
+}