Allow autoplay unmuted for WebAPK in the manifest scope

chrome/browser/android/tab_android.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 "chrome/browser/android/tab_android.h"
 
 #include <stddef.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
@@ skipping 727 matching lines @@
 void TabAndroid::SetInterceptNavigationDelegate(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj,
     const JavaParamRef<jobject>& delegate) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   InterceptNavigationDelegate::Associate(
       web_contents(),
       base::MakeUnique<ChromeInterceptNavigationDelegate>(env, delegate));
 }
 
+void TabAndroid::SetWebappManifestScope(JNIEnv* env,
+                                        const JavaParamRef<jobject>& obj,
+                                        const JavaParamRef<jstring>& scope) {
+  webapp_manifest_scope_ = base::android::ConvertJavaStringToUTF8(scope);
+
+  if (!web_contents() || !web_contents()->GetRenderViewHost())
+    return;
+
+  web_contents()->GetRenderViewHost()->OnWebkitPreferencesChanged();
+}
+
 void TabAndroid::AttachToTabContentManager(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj,
     const JavaParamRef<jobject>& jtab_content_manager) {
   android::TabContentManager* tab_content_manager =
       android::TabContentManager::FromJavaObject(jtab_content_manager);
   if (tab_content_manager == tab_content_manager_)
     return;
 
   if (tab_content_manager_)
     tab_content_manager_->DetachLiveLayer(GetAndroidId(), GetContentLayer());
   tab_content_manager_ = tab_content_manager;
   if (tab_content_manager_)
     tab_content_manager_->AttachLiveLayer(GetAndroidId(), GetContentLayer());
 }
 
 static void Init(JNIEnv* env, const JavaParamRef<jobject>& obj) {
   TRACE_EVENT0("native", "TabAndroid::Init");
   // This will automatically bind to the Java object and pass ownership there.
   new TabAndroid(env, obj);
 }
 
 // static
 bool TabAndroid::RegisterTabAndroid(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }