Don't bother layout until first navigation is done.

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

 /*
  * Copyright (C) 2010 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 4663 matching lines @@
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initialize(true, 0, &fakeSelectionWebViewClient);
     webViewHelper.webView()->settings()->setDefaultFontSize(12);
     webViewHelper.webView()->setDefaultPageScaleLimits(1, 1);
     webViewHelper.resize(WebSize(viewWidth, viewHeight));
     FrameTestHelpers::loadFrame(webViewHelper.webView()->mainFrame(), m_baseURL + "select_range_basic.html");
 
     // The frame starts with no selection.
     WebFrame* frame = webViewHelper.webView()->mainFrame();
     ASSERT_TRUE(frame->hasSelection());
-    EXPECT_TRUE(fakeSelectionLayerTreeView.getAndResetSelectionCleared());
+    EXPECT_FALSE(fakeSelectionLayerTreeView.selection());
 
     // The selection cleared notification should be triggered upon layout.
     frame->executeCommand(WebString::fromUTF8("Unselect"));
     ASSERT_FALSE(frame->hasSelection());
     EXPECT_FALSE(fakeSelectionLayerTreeView.getAndResetSelectionCleared());
     webViewHelper.webView()->updateAllLifecyclePhases();
     EXPECT_TRUE(fakeSelectionLayerTreeView.getAndResetSelectionCleared());
 
     frame->executeCommand(WebString::fromUTF8("SelectAll"));
     webViewHelper.webView()->updateAllLifecyclePhases();
@@ skipping 3712 matching lines @@
 }
 
 TEST_F(WebFrameVisibilityChangeTest, RemoteFrameParentVisibilityChange)
 {
     swapLocalFrameToRemoteFrame();
     executeScriptOnMainFrame(WebScriptSource("document.querySelector('iframe').parentElement.style.display = 'none';"));
     EXPECT_FALSE(remoteFrameClient()->isVisible());
 }
 
 } // namespace blink