Use correct ScrollbarTheme to paintScrollCorner

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 11138 matching lines @@
   WebMouseEvent mouseReleaseEvent(
       WebInputEvent::MouseUp, WebFloatPoint(1, 1), WebFloatPoint(1, 1),
       WebPointerProperties::Button::Left, 0,
       WebInputEvent::Modifiers::LeftButtonDown, TimeTicks::Now().InSeconds());
   mouseReleaseEvent.setFrameScale(1);
   document->frame()->eventHandler().handleMouseReleaseEvent(mouseReleaseEvent);
   EXPECT_EQ(scrollbar->pressedPart(), ScrollbarPart::NoPart);
   EXPECT_EQ(scrollbar->hoveredPart(), ScrollbarPart::NoPart);
 }
 
+TEST_F(WebFrameTest,
+       CustomScrollbarInOverlayScrollbarThemeWillNotCauseDCHECKFails) {
+  registerMockedHttpURLLoad(
+      "custom-scrollbar-dcheck-failed-when-paint-scroll-corner.html");
+  FrameTestHelpers::WebViewHelper webViewHelper;
+  WebViewImpl* webView = webViewHelper.initializeAndLoad(
+      m_baseURL +
+      "custom-scrollbar-dcheck-failed-when-paint-scroll-corner.html");
+
+  webViewHelper.resize(WebSize(200, 200));
+
+  // No DCHECK Fails. Issue 676678.
+  webView->updateAllLifecyclePhases();
+}
+
 static void disableCompositing(WebSettings* settings) {
   settings->setAcceleratedCompositingEnabled(false);
   settings->setPreferCompositingToLCDTextEnabled(false);
 }
 
 // Make sure overlay scrollbars on non-composited scrollers fade out and set
 // the hidden bit as needed.
 TEST_F(WebFrameTest, TestNonCompositedOverlayScrollbarsFade) {
   FrameTestHelpers::WebViewHelper webViewHelper;
   WebViewImpl* webViewImpl = webViewHelper.initialize(
@@ skipping 193 matching lines @@
   FrameTestHelpers::WebViewHelper openerHelper;
   openerHelper.initialize(false, nullptr, &openerWebViewClient);
   FrameTestHelpers::WebViewHelper helper;
   helper.initializeWithOpener(openerHelper.webView()->mainFrame());
 
   openerHelper.reset();
   EXPECT_EQ(nullptr, helper.webView()->mainFrameImpl()->opener());
 }
 
 }  // namespace blink