Move more standalone files from web/ to core/exported/.

third_party/WebKit/public/web/WebPageImportanceSignals.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 WebPageImportanceSignals_h
 #define WebPageImportanceSignals_h
 
 #include "public/platform/WebCommon.h"
 
 namespace blink {
 
 class WebViewClient;
 
 // WebPageImportanceSignals indicate the importance of the page state to user.
 // This signal is propagated to embedder so that it can prioritize preserving
 // state of certain page over the others.
 class WebPageImportanceSignals {
  public:
   WebPageImportanceSignals() { Reset(); }
 
   bool HadFormInteraction() const { return had_form_interaction_; }
-  void SetHadFormInteraction();
+  BLINK_EXPORT void SetHadFormInteraction();
   bool IssuedNonGetFetchFromScript() const {
     return issued_non_get_fetch_from_script_;
   }
-  void SetIssuedNonGetFetchFromScript();
+  BLINK_EXPORT void SetIssuedNonGetFetchFromScript();
 
   BLINK_EXPORT void Reset();
 #if BLINK_IMPLEMENTATION
-  void OnCommitLoad();
+  BLINK_EXPORT void OnCommitLoad();
 #endif
 
   void SetObserver(WebViewClient* observer) { observer_ = observer; }
 
  private:
   bool had_form_interaction_ : 1;
   bool issued_non_get_fetch_from_script_ : 1;
 
   WebViewClient* observer_ = nullptr;
 };
 
 }  // namespace blink
 
 #endif  // WebPageImportancesignals_h