[WebView] Add a new flushVisualState API to AwContents.

android_webview/native/aw_contents.cc

 // Copyright 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 "android_webview/native/aw_contents.h"
 
 #include <limits>
 
 #include "android_webview/browser/aw_browser_context.h"
 #include "android_webview/browser/aw_browser_main_parts.h"
@@ skipping 1016 matching lines @@
       new AwPicture(browser_view_renderer_.CapturePicture(width, height)));
 }
 
 void AwContents::EnableOnNewPicture(JNIEnv* env,
                                     jobject obj,
                                     jboolean enabled) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   browser_view_renderer_.EnableOnNewPicture(enabled);
 }
 
+namespace {
+void FlushVisualStateCallback(const JavaObjectWeakGlobalRef& java_ref,
+                              ScopedJavaGlobalRef<jobject>* callback,
+                              bool result) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = java_ref.get(env);
+  if (obj.is_null())
+     return;
+  Java_AwContents_flushVisualStateCallback(
+      env, obj.obj(), callback->obj(), result);
+}
+}  // namespace
+
+void AwContents::FlushVisualState(JNIEnv* env, jobject obj, jobject callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  ScopedJavaGlobalRef<jobject>* j_callback = new ScopedJavaGlobalRef<jobject>();
+  j_callback->Reset(env, callback);
+  web_contents_->GetMainFrame()->FlushVisualState(base::Bind(
+      &FlushVisualStateCallback, java_ref_, base::Owned(j_callback)));
+}
+
 void AwContents::ClearView(JNIEnv* env, jobject obj) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   browser_view_renderer_.ClearView();
 }
 
 void AwContents::SetExtraHeadersForUrl(JNIEnv* env, jobject obj,
                                        jstring url, jstring jextra_headers) {
   std::string extra_headers;
   if (jextra_headers)
     extra_headers = ConvertJavaStringToUTF8(env, jextra_headers);
@@ skipping 65 matching lines @@
 
   AwMessagePortServiceImpl::GetInstance()->CreateMessageChannel(env, callback,
       GetMessagePortMessageFilter());
 }
 
 void SetShouldDownloadFavicons(JNIEnv* env, jclass jclazz) {
   g_should_download_favicons = true;
 }
 
 }  // namespace android_webview