[draft] flush visual state prototype

android_webview/java/src/org/chromium/android_webview/AwContents.java

Index: android_webview/java/src/org/chromium/android_webview/AwContents.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwContents.java b/android_webview/java/src/org/chromium/android_webview/AwContents.java
index 3ee10deafe17e003768787f98b007027fe113eda..5579302375128e3667cdf6a4a460cd2496ac8e7b 100644
--- a/android_webview/java/src/org/chromium/android_webview/AwContents.java
+++ b/android_webview/java/src/org/chromium/android_webview/AwContents.java
@@ -2020,6 +2020,18 @@ public class AwContents implements SmartClipProvider {
         if (!isDestroyed()) nativeSetJsOnlineProperty(mNativeAwContents, networkUp);
     }
 
+    /**
+     * TODO: docs
+     */
+    public abstract static class VisualStateFlushCallback {
+        public abstract void onComplete();
+        public abstract void onFailure(int reason);
+    }
+
+    public void flushVisualState(VisualStateFlushCallback callback) {
+        nativeFlushVisualState(mNativeAwContents, callback);
+    }
+
     //--------------------------------------------------------------------------------------------
     //  Methods called from native via JNI
     //--------------------------------------------------------------------------------------------
@@ -2123,6 +2135,15 @@ public class AwContents implements SmartClipProvider {
         mContentsClient.getCallbackHelper().postOnNewPicture(mPictureListenerContentProvider);
     }
 
+    @CalledByNative
+    public static void flushVisualStateCallback(VisualStateFlushCallback callback, int value) {
+        if (value == 0) {
+            callback.onComplete();
+        } else {
+            callback.onFailure(value);
+        }
+    }
+
     // Called as a result of nativeUpdateLastHitTestData.
     @CalledByNative
     private void updateHitTestData(
@@ -2688,6 +2709,8 @@ public class AwContents implements SmartClipProvider {
     private native long nativeGetAwDrawGLViewContext(long nativeAwContents);
     private native long nativeCapturePicture(long nativeAwContents, int width, int height);
     private native void nativeEnableOnNewPicture(long nativeAwContents, boolean enabled);
+    private native void nativeFlushVisualState(long nativeAwContents,
+            VisualStateFlushCallback callback);
     private native void nativeClearView(long nativeAwContents);
     private native void nativeSetExtraHeadersForUrl(long nativeAwContents,
             String url, String extraHeaders);