Handle ctrl + shift + left click on links in PDF.

pdf/preview_mode_client.h

 // Copyright (c) 2011 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_PREVIEW_MODE_CLIENT_H_
 #define PDF_PREVIEW_MODE_CLIENT_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 15 matching lines @@
   explicit PreviewModeClient(Client* client);
   ~PreviewModeClient() override {}
 
   // PDFEngine::Client implementation.
   void DocumentSizeUpdated(const pp::Size& size) override;
   void Invalidate(const pp::Rect& rect) override;
   void Scroll(const pp::Point& point) override;
   void ScrollToX(int position) override;
   void ScrollToY(int position) override;
   void ScrollToPage(int page) override;
-  void NavigateTo(const std::string& url, bool open_in_new_tab) override;
+  void NavigateTo(const std::string& url, int option) override;
   void UpdateCursor(PP_CursorType_Dev cursor) override;
   void UpdateTickMarks(const std::vector<pp::Rect>& tickmarks) override;
   void NotifyNumberOfFindResultsChanged(int total, bool final_result) override;
   void NotifySelectedFindResultChanged(int current_find_index) override;
   void GetDocumentPassword(
       pp::CompletionCallbackWithOutput<pp::Var> callback) override;
   void Alert(const std::string& message) override;
   bool Confirm(const std::string& message) override;
   std::string Prompt(const std::string& question,
                      const std::string& default_answer) override;
@@ skipping 24 matching lines @@
   bool IsPrintPreview() override;
   uint32_t GetBackgroundColor() override;
 
  private:
   Client* const client_;
 };
 
 }  // namespace chrome_pdf
 
 #endif  // PDF_PREVIEW_MODE_CLIENT_H_