Remove the last references from production code to WebViewImpl.

third_party/WebKit/Source/core/exported/WebViewBase.h

Index: third_party/WebKit/Source/core/exported/WebViewBase.h
diff --git a/third_party/WebKit/Source/core/exported/WebViewBase.h b/third_party/WebKit/Source/core/exported/WebViewBase.h
index 197d2680a2ade3fe3b16649b09db32c9dae55b9f..cd286264a72e252b662319d5ed1bfc7cfa7c9cc9 100644
--- a/third_party/WebKit/Source/core/exported/WebViewBase.h
+++ b/third_party/WebKit/Source/core/exported/WebViewBase.h
@@ -62,7 +62,9 @@ class WebViewBase : public WebView, public RefCounted<WebViewBase> {
 
   virtual Page* GetPage() const = 0;
   virtual Frame* FocusedCoreFrame() const = 0;
+
   static WebViewBase* FromPage(Page*);
+  static HashSet<WebViewBase*>& AllInstances();
 
   // Returns the main frame associated with this view. This may be null when
   // the page is shutting down, but will be valid at all other times.
@@ -120,6 +122,7 @@ class WebViewBase : public WebView, public RefCounted<WebViewBase> {
 
   virtual WebSettingsImpl* SettingsImpl() = 0;
 
+  using WebWidget::GetPagePopup;
   virtual PagePopup* OpenPagePopup(PagePopupClient*) = 0;
   virtual void ClosePagePopup(PagePopup*) = 0;
   virtual void CleanupPagePopup() = 0;