Change beforeinstallprompt event to take an array of platforms.

Source/web/WebLocalFrameImpl.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 2012 matching lines @@
 
     // Screen Orientation API
     if (ScreenOrientationController::from(*frame()))
         ScreenOrientationController::from(*frame())->notifyOrientationChanged();
 
     // Legacy window.orientation API
     if (RuntimeEnabledFeatures::orientationEventEnabled() && frame()->domWindow())
         frame()->localDOMWindow()->sendOrientationChangeEvent();
 }
 
-void WebLocalFrameImpl::willShowInstallBannerPrompt(const WebString& platform, WebAppBannerPromptReply* reply)
+void WebLocalFrameImpl::willShowInstallBannerPrompt(const WebVector<WebString>& platforms, WebAppBannerPromptReply* reply)
 {
     if (!RuntimeEnabledFeatures::appBannerEnabled() || !frame())
         return;
 
-    AppBannerController::willShowInstallBannerPrompt(frame(), platform, reply);
+    AppBannerController::willShowInstallBannerPrompt(frame(), platforms, reply);
+}
+
+
+void WebLocalFrameImpl::willShowInstallBannerPrompt(const WebString& platform, WebAppBannerPromptReply* reply)
+{
+    WebVector<WebString> platforms(&platform, 1);
+    willShowInstallBannerPrompt(platforms, reply);
 }
 
 void WebLocalFrameImpl::requestRunTask(WebSuspendableTask* task) const
 {
     ASSERT(frame());
     ASSERT(frame()->document());
     frame()->document()->postSuspendableTask(WebSuspendableTaskWrapper::create(adoptPtr(task)));
 }
 
 void WebLocalFrameImpl::willBeDetached()
@@ skipping 62 matching lines @@
 {
     m_frameWidget = frameWidget;
 }
 
 WebFrameWidgetImpl* WebLocalFrameImpl::frameWidget() const
 {
     return m_frameWidget;
 }
 
 } // namespace blink