Introduce the abstract class WebViewBase, to decouple WebViewImpl.

third_party/WebKit/Source/web/SpellCheckerClientImpl.h

 /*
  * Copyright (C) 2009 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 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef SpellCheckerClientImpl_h
 #define SpellCheckerClientImpl_h
 
 #include "core/page/SpellCheckerClient.h"
 
 namespace blink {
 
-class WebViewImpl;
+class WebViewBase;
 
 // TODO(xiaochengh): Split SpellCheckerClientImpl into two classes according to
 // the split that should be done to its interface.
 class SpellCheckerClientImpl final : public SpellCheckerClient {
  public:
-  explicit SpellCheckerClientImpl(WebViewImpl*);
+  explicit SpellCheckerClientImpl(WebViewBase*);
 
   ~SpellCheckerClientImpl() override;
 
   bool IsSpellCheckingEnabled() override;
   void ToggleSpellCheckingEnabled() override;
   void UpdateSpellingUIWithMisspelledWord(const String&) override;
   void ShowSpellingUI(bool show) override;
   bool SpellingUIIsShowing() override;
 
  private:
   // Returns whether or not the focused control needs spell-checking.
   // Currently, this function just retrieves the focused node and determines
   // whether or not it is a <textarea> element or an element whose
   // contenteditable attribute is true.
   // FIXME: Bug 740540: This code just implements the default behavior
   // proposed in this issue. We should also retrieve "spellcheck" attributes
   // for text fields and create a flag to over-write the default behavior.
   bool ShouldSpellcheckByDefault();
 
-  WebViewImpl* web_view_;
+  WebViewBase* web_view_;
 
   // This flag is set to false if spell check for this editor is manually
   // turned off. The default setting is SpellCheckAutomatic.
   enum {
     kSpellCheckAutomatic,
     kSpellCheckForcedOn,
     kSpellCheckForcedOff
   } spell_check_this_field_status_;
 };
 
 }  // namespace blink
 
 #endif