Extract webkit_unit_tests from blink_web component.

third_party/WebKit/Source/web/WebFrameImplBase.h

 // 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.
 
 #ifndef WebFrameImplBase_h
 #define WebFrameImplBase_h
 
 #include "platform/heap/Handle.h"
+#include "web/WebExport.h"
 #include "wtf/text/AtomicString.h"
 
 namespace blink {
 
 class Frame;
 class FrameHost;
 class FrameOwner;
 
 // WebFrameImplBase exists to avoid the diamond inheritance problem:
 // - The public interfaces WebLocalFrame/WebRemoteFrame extend WebFrame.
 // - WebLocalFrameImpl implements WebLocalFrame and WebRemoteFrameImpl
 //   implements WebRemoteFrame.
 // - The private implementations should share some functionality, but cannot
 //   inherit from a common base class inheriting WebFrame. This would result in
 //   WebFrame beind inherited from two different base classes.
 //
 // To get around this, only the private implementations have WebFrameImplBase as
 // a base class. WebFrame exposes a virtual accessor to retrieve the underlying
 // implementation as an instance of the base class, but has no inheritance
 // relationship with it. The cost is a virtual indirection, but this is nicer
 // than the previous manual dispatch emulating real virtual dispatch.
-class WebFrameImplBase : public RefCountedWillBeGarbageCollectedFinalized<WebFrameImplBase> {
+class WEB_EXPORT WebFrameImplBase : public RefCountedWillBeGarbageCollectedFinalized<WebFrameImplBase> {
 public:
     virtual ~WebFrameImplBase();
 
     virtual void initializeCoreFrame(FrameHost*, FrameOwner*, const AtomicString& name, const AtomicString& uniqueName) = 0;
     // TODO(dcheng): Rename this to coreFrame()? This probably also shouldn't be const...
     virtual Frame* frame() const = 0;
 
     DECLARE_VIRTUAL_TRACE();
 };
 
 } // namespace blink
 
 #endif // WebFrameImplBase_h