Add font substitution metric for Linux

pdf/out_of_process_instance.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_OUT_OF_PROCESS_INSTANCE_H_
 #define PDF_OUT_OF_PROCESS_INSTANCE_H_
 
 #include <stdint.h>
 #include <string.h>
 
@@ skipping 110 matching lines @@
   std::string ShowFileSelectionDialog() override;
   pp::URLLoader CreateURLLoader() override;
   void ScheduleCallback(int id, int delay_in_ms) override;
   void SearchString(const base::char16* string,
                     const base::char16* term,
                     bool case_sensitive,
                     std::vector<SearchStringResult>* results) override;
   void DocumentPaintOccurred() override;
   void DocumentLoadComplete(int page_count) override;
   void DocumentLoadFailed() override;
+  void FontSubstituted() override;
   pp::Instance* GetPluginInstance() override;
   void DocumentHasUnsupportedFeature(const std::string& feature) override;
   void DocumentLoadProgress(uint32_t available, uint32_t doc_size) override;
   void FormTextFieldFocusChange(bool in_focus) override;
   bool IsPrintPreview() override;
   uint32_t GetBackgroundColor() override;
   void IsSelectingChanged(bool is_selecting) override;
 
   // PreviewModeClient::Client implementation.
   void PreviewDocumentLoadComplete() override;
@@ skipping 161 matching lines @@
   pp::UMAPrivate uma_;
 
   // Used so that we only tell the browser once about an unsupported feature, to
   // avoid the infobar going up more than once.
   bool told_browser_about_unsupported_feature_;
 
   // Keeps track of which unsupported features we reported, so we avoid spamming
   // the stats if a feature shows up many times per document.
   std::set<std::string> unsupported_features_reported_;
 
+  // Keeps track of whether font substitution has been reported, so we avoid
+  // spamming the stats if a document requested multiple substitutes.
+  bool font_substitution_reported_;
+
   // Number of pages in print preview mode, 0 if not in print preview mode.
   int print_preview_page_count_;
   std::vector<int> print_preview_page_numbers_;
 
   // Used to manage loaded print preview page information. A |PreviewPageInfo|
   // consists of data source url string and the page index in the destination
   // document.
   typedef std::pair<std::string, int> PreviewPageInfo;
   std::queue<PreviewPageInfo> preview_pages_info_;
 
@@ skipping 40 matching lines @@
     ACCESSIBILITY_STATE_PENDING,  // Enabled but waiting for doc to load.
     ACCESSIBILITY_STATE_LOADED
   } accessibility_state_;
 
   DISALLOW_COPY_AND_ASSIGN(OutOfProcessInstance);
 };
 
 }  // namespace chrome_pdf
 
 #endif  // PDF_OUT_OF_PROCESS_INSTANCE_H_