Don't use webmediaplayer to FullscreenController about fullscreen change

android_webview/native/aw_settings.cc

 // 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.
 
 #include "android_webview/native/aw_settings.h"
 
 #include "android_webview/browser/renderer_host/aw_render_view_host_ext.h"
 #include "android_webview/common/aw_content_client.h"
 #include "android_webview/native/aw_contents.h"
 #include "base/android/jni_android.h"
@@ skipping 410 matching lines @@
     // slightly to turn canvas off without changing
     // accelerated_2d_canvas_enabled, which also affects compositing mode.
     // Using 100M instead of max int to avoid overflows.
     web_prefs->minimum_accelerated_2d_canvas_size = 100 * 1000 * 1000;
   }
 
   web_prefs->allow_displaying_insecure_content =
       Java_AwSettings_getAllowDisplayingInsecureContentLocked(env, obj);
   web_prefs->allow_running_insecure_content =
       Java_AwSettings_getAllowRunningInsecureContentLocked(env, obj);
+
+  web_prefs->disallow_fullscreen_for_non_media_elements = true;
 }
 
 static jlong Init(JNIEnv* env,
                   jobject obj,
                   jlong web_contents) {
   AwSettings* settings = new AwSettings(env, obj, web_contents);
   return reinterpret_cast<intptr_t>(settings);
 }
 
 static jstring GetDefaultUserAgent(JNIEnv* env, jclass clazz) {
   return base::android::ConvertUTF8ToJavaString(env, GetUserAgent()).Release();
 }
 
 bool RegisterAwSettings(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android_webview