[blink] Support (semi-)transparent background colors in WebView/Frame.

third_party/WebKit/Source/core/layout/LayoutTestHelper.cpp

 // Copyright 2014 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 "core/layout/LayoutTestHelper.h"
 
 #include "bindings/core/v8/StringOrArrayBufferOrArrayBufferView.h"
 #include "core/css/FontFaceDescriptors.h"
 #include "core/css/FontFaceSet.h"
 #include "core/dom/DOMArrayBuffer.h"
 #include "core/html/HTMLIFrameElement.h"
 #include "platform/loader/fetch/MemoryCache.h"
 #include "platform/scroll/ScrollbarTheme.h"
 #include "platform/testing/UnitTestHelpers.h"
 
 namespace blink {
 
 LocalFrame* SingleChildLocalFrameClient::createFrame(
     const FrameLoadRequest&,
     const AtomicString& name,
     HTMLFrameOwnerElement* ownerElement) {
   DCHECK(!m_child) << "This test helper only supports one child frame.";
 
   LocalFrame* parentFrame = ownerElement->document().frame();
   auto* childClient = LocalFrameClientWithParent::create(parentFrame);
   m_child = LocalFrame::create(childClient, *parentFrame->page(), ownerElement);
-  m_child->createView(IntSize(500, 500), Color(), true /* transparent */);
+  m_child->createView(IntSize(500, 500), Color::transparent);
   m_child->init();
 
   return m_child.get();
 }
 
 void LocalFrameClientWithParent::detached(FrameDetachType) {
   static_cast<SingleChildLocalFrameClient*>(parent()->client())
       ->didDetachChild();
 }
 
@@ skipping 46 matching lines @@
   FontFace* ahem =
       FontFace::create(&document(), "Ahem", buffer, FontFaceDescriptors());
 
   ScriptState* scriptState = ScriptState::forMainWorld(&m_pageHolder->frame());
   DummyExceptionStateForTesting exceptionState;
   FontFaceSet::from(document())
       ->addForBinding(scriptState, ahem, exceptionState);
 }
 
 }  // namespace blink