Remove some c_str() calls from StringCs in xfa docs.

xfa/fxfa/include/fxfa.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef XFA_FXFA_INCLUDE_FXFA_H_
 #define XFA_FXFA_INCLUDE_FXFA_H_
 
 #include <vector>
@@ skipping 293 matching lines @@
 
   /**
    * Causes the system to play a sound.
    * @param[in] dwType The system code for the appropriate sound.0 (Error)1
    * (Warning)2 (Question)3 (Status)4 (Default)
    */
   virtual void Beep(uint32_t dwType) = 0;
 
   /**
    * Displays a message box.
-   * @param[in] dwIconType    Icon type, refer to XFA_MBICON.
-   * @param[in] dwButtonType  Button type, refer to XFA_MESSAGEBUTTON.
+   * @param[in] wsMessage    - Message string to display in box.
+   * @param[in] wsTitle      - Title string for box.
+   * @param[in] dwIconType   - Icon type, refer to XFA_MBICON.
+   * @param[in] dwButtonType - Button type, refer to XFA_MESSAGEBUTTON.
    * @return A valid integer representing the value of the button pressed by the
    * user, refer to XFA_ID.
    */
-  virtual int32_t MsgBox(const CFX_WideStringC& wsMessage,
-                         const CFX_WideStringC& wsTitle = FX_WSTRC(L""),
+  virtual int32_t MsgBox(const CFX_WideString& wsMessage,
+                         const CFX_WideString& wsTitle = L"",
                          uint32_t dwIconType = 0,
                          uint32_t dwButtonType = 0) = 0;
 
   /**
    * Get a response from the user.
-   * @param[in] bMark - Mask the user input with * (asterisks) when true,
+   * @param[in] wsQuestion      - Message string to display in box.
+   * @param[in] wsTitle         - Title string for box.
+   * @param[in] wsDefaultAnswer - Initial contents for answer.
+   * @param[in] bMask           - Mask the user input with asterisks when true,
+   * @return A string containing the user's response.
    */
-  virtual void Response(CFX_WideString& wsAnswer,
-                        const CFX_WideStringC& wsQuestion,
-                        const CFX_WideStringC& wsTitle = FX_WSTRC(L""),
-                        const CFX_WideStringC& wsDefaultAnswer = FX_WSTRC(L""),
-                        FX_BOOL bMark = TRUE) = 0;
+  virtual CFX_WideString Response(const CFX_WideString& wsQuestion,
+                                  const CFX_WideString& wsTitle = L"",
+                                  const CFX_WideString& wsDefaultAnswer = L"",
+                                  FX_BOOL bMask = TRUE) = 0;
 
   virtual int32_t GetDocumentCountInBatch() = 0;
   virtual int32_t GetCurDocumentInBatch() = 0;
 
   /**
    * Download something from somewhere.
    * @param[in] wsURL - http, ftp, such as
    * "http://www.w3.org/TR/REC-xml-names/".
    */
-  virtual IFX_FileRead* DownloadURL(const CFX_WideStringC& wsURL) = 0;
+  virtual IFX_FileRead* DownloadURL(const CFX_WideString& wsURL) = 0;
 
   /**
    * POST data to the given url.
    * @param[in] wsURL         the URL being uploaded.
    * @param[in] wsData        the data being uploaded.
    * @param[in] wsContentType the content type of data including text/html,
    * text/xml, text/plain, multipart/form-data,
    *                          application/x-www-form-urlencoded,
    * application/octet-stream, any valid MIME type.
    * @param[in] wsEncode      the encode of data including UTF-8, UTF-16,
    * ISO8859-1, any recognized [IANA]character encoding
    * @param[in] wsHeader      any additional HTTP headers to be included in the
    * post.
    * @param[out] wsResponse   decoded response from server.
    * @return TRUE Server permitted the post request, FALSE otherwise.
    */
-  virtual FX_BOOL PostRequestURL(const CFX_WideStringC& wsURL,
-                                 const CFX_WideStringC& wsData,
-                                 const CFX_WideStringC& wsContentType,
-                                 const CFX_WideStringC& wsEncode,
-                                 const CFX_WideStringC& wsHeader,
+  virtual FX_BOOL PostRequestURL(const CFX_WideString& wsURL,
+                                 const CFX_WideString& wsData,
+                                 const CFX_WideString& wsContentType,
+                                 const CFX_WideString& wsEncode,
+                                 const CFX_WideString& wsHeader,
                                  CFX_WideString& wsResponse) = 0;
 
   /**
    * PUT data to the given url.
    * @param[in] wsURL         the URL being uploaded.
    * @param[in] wsData            the data being uploaded.
    * @param[in] wsEncode      the encode of data including UTF-8, UTF-16,
    * ISO8859-1, any recognized [IANA]character encoding
    * @return TRUE Server permitted the post request, FALSE otherwise.
    */
-  virtual FX_BOOL PutRequestURL(const CFX_WideStringC& wsURL,
-                                const CFX_WideStringC& wsData,
-                                const CFX_WideStringC& wsEncode) = 0;
+  virtual FX_BOOL PutRequestURL(const CFX_WideString& wsURL,
+                                const CFX_WideString& wsData,
+                                const CFX_WideString& wsEncode) = 0;
 
   virtual void LoadString(int32_t iStringID, CFX_WideString& wsString) = 0;
   virtual IFWL_AdapterTimerMgr* GetTimerMgr() = 0;
 };
 
 class IXFA_DocProvider {
  public:
   virtual ~IXFA_DocProvider() {}
 
   virtual void SetChangeMark(CXFA_FFDoc* hDoc) = 0;
@@ skipping 22 matching lines @@
     return FALSE;
   }
   virtual int32_t CountPages(CXFA_FFDoc* hDoc) = 0;
   virtual int32_t GetCurrentPage(CXFA_FFDoc* hDoc) = 0;
   virtual void SetCurrentPage(CXFA_FFDoc* hDoc, int32_t iCurPage) = 0;
   virtual FX_BOOL IsCalculationsEnabled(CXFA_FFDoc* hDoc) = 0;
   virtual void SetCalculationsEnabled(CXFA_FFDoc* hDoc, FX_BOOL bEnabled) = 0;
   virtual void GetTitle(CXFA_FFDoc* hDoc, CFX_WideString& wsTitle) = 0;
   virtual void SetTitle(CXFA_FFDoc* hDoc, const CFX_WideString& wsTitle) = 0;
   virtual void ExportData(CXFA_FFDoc* hDoc,
-                          const CFX_WideStringC& wsFilePath,
+                          const CFX_WideString& wsFilePath,
                           FX_BOOL bXDP = TRUE) = 0;
   virtual void ImportData(CXFA_FFDoc* hDoc,
-                          const CFX_WideStringC& wsFilePath) = 0;
+                          const CFX_WideString& wsFilePath) = 0;
   virtual void GotoURL(CXFA_FFDoc* hDoc,
-                       const CFX_WideStringC& bsURL,
+                       const CFX_WideString& bsURL,
                        FX_BOOL bAppend = TRUE) = 0;
   virtual FX_BOOL IsValidationsEnabled(CXFA_FFDoc* hDoc) = 0;
   virtual void SetValidationsEnabled(CXFA_FFDoc* hDoc, FX_BOOL bEnabled) = 0;
   virtual void SetFocusWidget(CXFA_FFDoc* hDoc, CXFA_FFWidget* hWidget) = 0;
   virtual void Print(CXFA_FFDoc* hDoc,
                      int32_t nStartPage,
                      int32_t nEndPage,
                      uint32_t dwOptions) = 0;
   virtual int32_t AbsPageCountInBatch(CXFA_FFDoc* hDoc) = 0;
   virtual int32_t AbsPageInBatch(CXFA_FFDoc* hDoc, CXFA_FFWidget* hWidget) = 0;
@@ skipping 108 matching lines @@
   virtual CXFA_FFWidget* MoveToNext() = 0;
   virtual CXFA_FFWidget* MoveToPrevious() = 0;
   virtual CXFA_FFWidget* GetCurrentWidget() = 0;
   virtual FX_BOOL SetCurrentWidget(CXFA_FFWidget* hWidget) = 0;
 
  protected:
   virtual ~IXFA_WidgetIterator() {}
 };
 
 #endif  // XFA_FXFA_INCLUDE_FXFA_H_