Fire visibilityChange event on out-of-process iframes.

third_party/WebKit/Source/web/tests/FrameThrottlingTest.cpp

 // Copyright 2015 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 "bindings/core/v8/ScriptController.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/html/HTMLIFrameElement.h"
@@ skipping 408 matching lines @@
     EXPECT_FALSE(compositor().hasSelection());
     document().page()->focusController().setFocusedFrame(frameElement->contentDocument()->frame());
     document().body()->setAttribute(styleAttr, "background: green");
     compositeFrame();
     EXPECT_FALSE(compositor().hasSelection());
 }
 
 TEST(RemoteFrameThrottlingTest, ThrottledLocalRoot)
 {
     FrameTestHelpers::TestWebViewClient viewClient;
-    WebViewImpl* webView = WebViewImpl::create(&viewClient);
+    WebViewImpl* webView = WebViewImpl::create(&viewClient, WebPageVisibilityStateVisible);
     webView->resize(WebSize(640, 480));
 
     // Create a remote root frame with a local child frame.
     FrameTestHelpers::TestWebRemoteFrameClient remoteClient;
     webView->setMainFrame(remoteClient.frame());
     remoteClient.frame()->setReplicatedOrigin(WebSecurityOrigin::createUnique());
 
     WebFrameOwnerProperties properties;
     WebRemoteFrame* rootFrame = webView->mainFrame()->toWebRemoteFrame();
     WebLocalFrame* localFrame = FrameTestHelpers::createLocalChild(rootFrame);
@@ skipping 405 matching lines @@
     localFrame->script().executeScriptInMainWorld(
         "window.requestAnimationFrame(function() {\n"
         "  var throttledFrame = window.parent.frames.first;\n"
         "  throttledFrame.document.documentElement.style = 'margin: 50px';\n"
         "  throttledFrame.document.querySelector('#d').getBoundingClientRect();\n"
         "});\n");
     compositeFrame();
 }
 
 } // namespace blink