PDF: Use PDF metadata for the title instead of the last path element.

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 <map>
 #include <string>
 #include <utility>
@@ skipping 81 matching lines @@
   virtual std::string GetPageAsJSON(int index);
   virtual bool GetPrintScaling();
   virtual int GetCopiesToPrint();
   virtual int GetDuplexType();
   virtual bool GetPageSizeAndUniformity(pp::Size* size);
   virtual void AppendBlankPages(int num_pages);
   virtual void AppendPage(PDFEngine* engine, int index);
   virtual pp::Point GetScrollPosition();
   virtual void SetScrollPosition(const pp::Point& position);
   virtual bool IsProgressiveLoad();
+  virtual std::string GetMetadata(const std::string& key);
 
   // DocumentLoader::Client implementation.
   virtual pp::Instance* GetPluginInstance();
   virtual pp::URLLoader CreateURLLoader();
   virtual void OnPartialDocumentLoaded();
   virtual void OnPendingRequestComplete();
   virtual void OnNewDataAvailable();
   virtual void OnDocumentComplete();
 
   void UnsupportedFeature(int type);
@@ skipping 639 matching lines @@
 
   // See the definition of GetPDFPageSizeByIndex in pdf.cc for details.
   virtual bool GetPDFPageSizeByIndex(const void* pdf_buffer,
                                      int pdf_buffer_size, int page_number,
                                      double* width, double* height);
 };
 
 }  // namespace chrome_pdf
 
 #endif  // PDF_PDFIUM_PDFIUM_ENGINE_H_