Hide fullscreen rotation jank

chrome/browser/android/tab_android.h

 // Copyright (c) 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.
 
 #ifndef CHROME_BROWSER_ANDROID_TAB_ANDROID_H_
 #define CHROME_BROWSER_ANDROID_TAB_ANDROID_H_
 
 #include <jni.h>
 #include <stdint.h>
 
@@ skipping 210 matching lines @@
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,
       const base::android::JavaParamRef<jobject>& delegate);
 
   // TODO(dtrainor): Remove this, pull content_layer() on demand.
   void AttachToTabContentManager(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,
       const base::android::JavaParamRef<jobject>& jtab_content_manager);
 
+  void ClearThumbnailPlaceholder(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj);
+
   bool HasPrerenderedUrl(JNIEnv* env,
                          const base::android::JavaParamRef<jobject>& obj,
                          const base::android::JavaParamRef<jstring>& url);
 
   void SetWebappManifestScope(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,
       const base::android::JavaParamRef<jstring>& scope);
 
   const std::string& GetWebappManifestScope() const {
@@ skipping 39 matching lines @@
   scoped_refptr<content::DevToolsAgentHost> devtools_host_;
   std::unique_ptr<browser_sync::SyncedTabDelegateAndroid> synced_tab_delegate_;
 
   std::string webapp_manifest_scope_;
   bool embedded_media_experience_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(TabAndroid);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_TAB_ANDROID_H_