[DevTools] Disable plugins when emulating mobile.

Source/web/WebSettingsImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 263 matching lines @@
     m_settings->setImagesEnabled(enabled);
 }
 
 void WebSettingsImpl::setLoadWithOverviewMode(bool enabled)
 {
     m_settings->setLoadWithOverviewMode(enabled);
 }
 
 void WebSettingsImpl::setPluginsEnabled(bool enabled)
 {
-    m_settings->setPluginsEnabled(enabled);
+    m_devToolsEmulator->setPluginsEnabled(enabled);
 }
 
 void WebSettingsImpl::setAvailablePointerTypes(int pointers)
 {
     m_settings->setAvailablePointerTypes(pointers);
 }
 
 void WebSettingsImpl::setPrimaryPointerType(PointerType pointer)
 {
     m_settings->setPrimaryPointerType(static_cast<blink::PointerType>(pointer));
@@ skipping 489 matching lines @@
 {
     m_settings->setV8CacheOptions(static_cast<blink::V8CacheOptions>(options));
 }
 
 void WebSettingsImpl::setUseMobileViewportStyle(bool enabled)
 {
     m_devToolsEmulator->setUseMobileViewportStyle(enabled);
 }
 
 } // namespace blink