PDF: Always call FPDFAvail_IsDocAvail() when loading.

pdf/pdfium/pdfium_engine.h

 // Copyright (c) 2012 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 PDF_PDFIUM_PDFIUM_ENGINE_H_
 #define PDF_PDFIUM_PDFIUM_ENGINE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 200 matching lines @@
   // We finished getting the pdf file, so load it. This will complete
   // asynchronously (due to password fetching) and may be run multiple times.
   void LoadDocument();
 
   // Try loading the document. Returns true if the document is successfully
   // loaded or is already loaded otherwise it will return false. If there is a
   // password, then |password| is non-empty. If the document could not be loaded
   // and needs a password, |needs_password| will be set to true.
   bool TryLoadingDoc(const std::string& password, bool* needs_password);
 
-  // Ask the user for the document password and then continue loading the
+  // Asks the user for the document password and then continue loading the
   // document.
   void GetPasswordAndLoad();
 
   // Called when the password has been retrieved.
   void OnGetPasswordComplete(int32_t result,
                              const pp::Var& password);
 
   // Continues loading the document when the password has been retrieved, or if
   // there is no password. If there is no password, then |password| is empty.
   void ContinueLoadingDocument(const std::string& password);
 
-  // Finish loading the document and notify the client that the document has
-  // been loaded. This should only be run after |doc_| has been loaded and the
-  // document is fully downloaded. If this has been run once, it will result in
-  // a no-op.
+  // Finishes loading the document. Recalculate the document size if there were
+  // pages that were not previously available.
+  // Also notifies the client that the document has been loaded.
+  // This should only be called after |doc_| has been loaded and the document is
+  // fully downloaded.
+  // If this has been run once, it will not notify the client again.
   void FinishLoadingDocument();
 
   // Loads information about the pages in the document and calculate the
   // document size.
   void LoadPageInfo(bool reload);
 
-  // Calculate which pages should be displayed right now.
+  // Calculates which pages should be displayed right now.
   void CalculateVisiblePages();
 
   // Returns true iff the given page index is visible.  CalculateVisiblePages
   // must have been called first.
   bool IsPageVisible(int index) const;
 
   // Checks if a page is now available, and if so marks it as such and returns
   // true.  Otherwise, it will return false and will add the index to the given
   // array if it's not already there.
   bool CheckPageAvailable(int index, std::vector<int>* pending);
@@ skipping 499 matching lines @@
   bool GetPDFPageSizeByIndex(const void* pdf_buffer,
                              int pdf_buffer_size,
                              int page_number,
                              double* width,
                              double* height) override;
 };
 
 }  // namespace chrome_pdf
 
 #endif  // PDF_PDFIUM_PDFIUM_ENGINE_H_