Mark methods with override in pdf/

Fix some small nits along the way.

Review URL: https://codereview.chromium.org/1554533002

Cr-Commit-Position: refs/heads/master@{#367109}

8 files changed, 156 insertions, 151 deletions

diff --git a/pdf/document_loader.h b/pdf/document_loader.h
index e5e08d6..c9d355b 100644
--- a/pdf/document_loader.h
+++ b/pdf/document_loader.h
@@ -101,7 +101,7 @@ class DocumentLoader {
   // Number was chosen in crbug.com/78264#c8
   enum { kDefaultRequestSize = 65536 };
 
-  Client* client_;
+  Client* const client_;
   std::string url_;
   pp::URLLoader loader_;
   pp::CompletionCallbackFactory<DocumentLoader> loader_factory_;
diff --git a/pdf/out_of_process_instance.h b/pdf/out_of_process_instance.h
index 41fef65..f210d0a5 100644
--- a/pdf/out_of_process_instance.h
+++ b/pdf/out_of_process_instance.h
@@ -74,9 +74,8 @@ class OutOfProcessInstance : public pp::Instance,
   bool IsPrintScalingDisabled() override;
 
   // pp::Private implementation.
-  virtual pp::Var GetLinkAtPosition(const pp::Point& point);
-  virtual void GetPrintPresetOptionsFromDocument(
-      PP_PdfPrintPresetOptions_Dev* options);
+  pp::Var GetLinkAtPosition(const pp::Point& point);
+  void GetPrintPresetOptionsFromDocument(PP_PdfPrintPresetOptions_Dev* options);
 
   void FlushCallback(int32_t result);
   void DidOpen(int32_t result);
diff --git a/pdf/pdf.cc b/pdf/pdf.cc
index f52ee97..fa43eae 100644
--- a/pdf/pdf.cc
+++ b/pdf/pdf.cc
@@ -104,8 +104,8 @@ bool RenderPDFPageToDC(const void* pdf_buffer,
       return false;
     }
   }
-  scoped_ptr<chrome_pdf::PDFEngineExports> engine_exports(
-      chrome_pdf::PDFEngineExports::Create());
+  chrome_pdf::PDFEngineExports* engine_exports =
+      chrome_pdf::PDFEngineExports::Get();
   chrome_pdf::PDFEngineExports::RenderingSettings settings(
       dpi, dpi, pp::Rect(bounds_origin_x, bounds_origin_y, bounds_width,
                          bounds_height),
@@ -128,8 +128,8 @@ bool GetPDFDocInfo(const void* pdf_buffer,
     if (!chrome_pdf::InitializeSDK())
       return false;
   }
-  scoped_ptr<chrome_pdf::PDFEngineExports> engine_exports(
-      chrome_pdf::PDFEngineExports::Create());
+  chrome_pdf::PDFEngineExports* engine_exports =
+      chrome_pdf::PDFEngineExports::Get();
   bool ret = engine_exports->GetPDFDocInfo(
       pdf_buffer, buffer_size, page_count, max_page_width);
   if (!g_sdk_initialized_via_pepper) {
@@ -145,8 +145,8 @@ bool GetPDFPageSizeByIndex(const void* pdf_buffer,
     if (!chrome_pdf::InitializeSDK())
       return false;
   }
-  scoped_ptr<chrome_pdf::PDFEngineExports> engine_exports(
-      chrome_pdf::PDFEngineExports::Create());
+  chrome_pdf::PDFEngineExports* engine_exports =
+      chrome_pdf::PDFEngineExports::Get();
   bool ret = engine_exports->GetPDFPageSizeByIndex(
       pdf_buffer, pdf_buffer_size, page_number, width, height);
   if (!g_sdk_initialized_via_pepper)
@@ -166,8 +166,8 @@ bool RenderPDFPageToBitmap(const void* pdf_buffer,
     if (!chrome_pdf::InitializeSDK())
       return false;
   }
-  scoped_ptr<chrome_pdf::PDFEngineExports> engine_exports(
-      chrome_pdf::PDFEngineExports::Create());
+  chrome_pdf::PDFEngineExports* engine_exports =
+      chrome_pdf::PDFEngineExports::Get();
   chrome_pdf::PDFEngineExports::RenderingSettings settings(
       dpi, dpi, pp::Rect(bitmap_width, bitmap_height), true, false, true, true,
       autorotate);
diff --git a/pdf/pdf.h b/pdf/pdf.h
index 37e72e5..342757f 100644
--- a/pdf/pdf.h
+++ b/pdf/pdf.h
@@ -13,11 +13,11 @@ namespace chrome_pdf {
 class PDFModule : public pp::Module {
  public:
   PDFModule();
-  virtual ~PDFModule();
+  ~PDFModule() override;
 
   // pp::Module implementation.
-  virtual bool Init();
-  virtual pp::Instance* CreateInstance(PP_Instance instance);
+  bool Init() override;
+  pp::Instance* CreateInstance(PP_Instance instance) override;
 };
 
 int PPP_InitializeModule(PP_Module module_id,
diff --git a/pdf/pdf_engine.h b/pdf/pdf_engine.h
index aa74875..7df4bff2 100644
--- a/pdf/pdf_engine.h
+++ b/pdf/pdf_engine.h
@@ -61,6 +61,8 @@ class PDFEngine {
   // The interface that's provided to the rendering engine.
   class Client {
    public:
+    virtual ~Client() {}
+
     // Informs the client about the document's size in pixels.
     virtual void DocumentSizeUpdated(const pp::Size& size) = 0;
 
@@ -315,7 +317,8 @@ class PDFEngineExports {
 
   PDFEngineExports() {}
   virtual ~PDFEngineExports() {}
-  static PDFEngineExports* Create();
+  static PDFEngineExports* Get();
+
 #if defined(OS_WIN)
   // See the definition of RenderPDFPageToDC in pdf.cc for details.
   virtual bool RenderPDFPageToDC(const void* pdf_buffer,
diff --git a/pdf/pdfium/pdfium_engine.cc b/pdf/pdfium/pdfium_engine.cc
index 9bf10fb..90c4df5 100644
--- a/pdf/pdfium/pdfium_engine.cc
+++ b/pdf/pdfium/pdfium_engine.cc
@@ -11,6 +11,7 @@
 #include "base/i18n/icu_encoding_detection.h"
 #include "base/i18n/icu_string_conversions.h"
 #include "base/json/json_writer.h"
+#include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
@@ -3777,12 +3778,11 @@ ScopedUnsupportedFeature::~ScopedUnsupportedFeature() {
   g_engine_for_unsupported = old_engine_;
 }
 
-PDFEngineExports* PDFEngineExports::Create() {
-  return new PDFiumEngineExports;
-}
-
 namespace {
 
+base::LazyInstance<PDFiumEngineExports>::Leaky g_pdf_engine_exports =
+    LAZY_INSTANCE_INITIALIZER;
+
 int CalculatePosition(FPDF_PAGE page,
                       const PDFiumEngineExports::RenderingSettings& settings,
                       pp::Rect* dest) {
@@ -3848,6 +3848,10 @@ int CalculatePosition(FPDF_PAGE page,
 
 }  // namespace
 
+PDFEngineExports* PDFEngineExports::Get() {
+  return g_pdf_engine_exports.Pointer();
+}
+
 #if defined(OS_WIN)
 bool PDFiumEngineExports::RenderPDFPageToDC(const void* pdf_buffer,
                                             int buffer_size,
@@ -3931,7 +3935,7 @@ bool PDFiumEngineExports::RenderPDFPageToDC(const void* pdf_buffer,
   FPDF_CloseDocument(doc);
   return true;
 }
-#endif  // OS_WIN
+#endif  // defined(OS_WIN)
 
 bool PDFiumEngineExports::RenderPDFPageToBitmap(
     const void* pdf_buffer,
diff --git a/pdf/pdfium/pdfium_engine.h b/pdf/pdfium/pdfium_engine.h
index 3ebe68f0..88a2575 100644
--- a/pdf/pdfium/pdfium_engine.h
+++ b/pdf/pdfium/pdfium_engine.h
@@ -47,71 +47,70 @@ class PDFiumEngine : public PDFEngine,
                      public IFSDK_PAUSE {
  public:
   explicit PDFiumEngine(PDFEngine::Client* client);
-  virtual ~PDFiumEngine();
+  ~PDFiumEngine() override;
 
   // PDFEngine implementation.
-  virtual bool New(const char* url, const char* headers);
-  virtual void PageOffsetUpdated(const pp::Point& page_offset);
-  virtual void PluginSizeUpdated(const pp::Size& size);
-  virtual void ScrolledToXPosition(int position);
-  virtual void ScrolledToYPosition(int position);
-  virtual void PrePaint();
-  virtual void Paint(const pp::Rect& rect,
-                     pp::ImageData* image_data,
-                     std::vector<pp::Rect>* ready,
-                     std::vector<pp::Rect>* pending);
-  virtual void PostPaint();
-  virtual bool HandleDocumentLoad(const pp::URLLoader& loader);
-  virtual bool HandleEvent(const pp::InputEvent& event);
-  virtual uint32_t QuerySupportedPrintOutputFormats();
-  virtual void PrintBegin();
-  virtual pp::Resource PrintPages(
-      const PP_PrintPageNumberRange_Dev* page_ranges,
-      uint32_t page_range_count,
-      const PP_PrintSettings_Dev& print_settings);
-  virtual void PrintEnd();
-  virtual void StartFind(const std::string& text, bool case_sensitive);
-  virtual bool SelectFindResult(bool forward);
-  virtual void StopFind();
-  virtual void ZoomUpdated(double new_zoom_level);
-  virtual void RotateClockwise();
-  virtual void RotateCounterclockwise();
-  virtual std::string GetSelectedText();
-  virtual std::string GetLinkAtPosition(const pp::Point& point);
-  virtual bool IsSelecting();
-  virtual bool HasPermission(DocumentPermission permission) const;
-  virtual void SelectAll();
-  virtual int GetNumberOfPages();
-  virtual pp::VarArray GetBookmarks();
-  virtual int GetNamedDestinationPage(const std::string& destination);
-  virtual int GetFirstVisiblePage();
-  virtual int GetMostVisiblePage();
-  virtual pp::Rect GetPageRect(int index);
-  virtual pp::Rect GetPageContentsRect(int index);
-  virtual pp::Rect GetPageScreenRect(int page_index) const;
-  virtual int GetVerticalScrollbarYPosition() { return position_.y(); }
-  virtual void PaintThumbnail(pp::ImageData* image_data, int index);
-  virtual void SetGrayscale(bool grayscale);
-  virtual void OnCallback(int id);
-  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);
+  bool New(const char* url, const char* headers) override;
+  void PageOffsetUpdated(const pp::Point& page_offset) override;
+  void PluginSizeUpdated(const pp::Size& size) override;
+  void ScrolledToXPosition(int position) override;
+  void ScrolledToYPosition(int position) override;
+  void PrePaint() override;
+  void Paint(const pp::Rect& rect,
+             pp::ImageData* image_data,
+             std::vector<pp::Rect>* ready,
+             std::vector<pp::Rect>* pending) override;
+  void PostPaint() override;
+  bool HandleDocumentLoad(const pp::URLLoader& loader) override;
+  bool HandleEvent(const pp::InputEvent& event) override;
+  uint32_t QuerySupportedPrintOutputFormats() override;
+  void PrintBegin() override;
+  pp::Resource PrintPages(const PP_PrintPageNumberRange_Dev* page_ranges,
+                          uint32_t page_range_count,
+                          const PP_PrintSettings_Dev& print_settings) override;
+  void PrintEnd() override;
+  void StartFind(const std::string& text, bool case_sensitive) override;
+  bool SelectFindResult(bool forward) override;
+  void StopFind() override;
+  void ZoomUpdated(double new_zoom_level) override;
+  void RotateClockwise() override;
+  void RotateCounterclockwise() override;
+  std::string GetSelectedText() override;
+  std::string GetLinkAtPosition(const pp::Point& point) override;
+  bool IsSelecting() override;
+  bool HasPermission(DocumentPermission permission) const override;
+  void SelectAll() override;
+  int GetNumberOfPages() override;
+  pp::VarArray GetBookmarks() override;
+  int GetNamedDestinationPage(const std::string& destination) override;
+  int GetFirstVisiblePage() override;
+  int GetMostVisiblePage() override;
+  pp::Rect GetPageRect(int index) override;
+  pp::Rect GetPageContentsRect(int index) override;
+  pp::Rect GetPageScreenRect(int page_index) const override;
+  int GetVerticalScrollbarYPosition() override { return position_.y(); }
+  void PaintThumbnail(pp::ImageData* image_data, int index) override;
+  void SetGrayscale(bool grayscale) override;
+  void OnCallback(int id) override;
+  std::string GetPageAsJSON(int index) override;
+  bool GetPrintScaling() override;
+  int GetCopiesToPrint() override;
+  int GetDuplexType() override;
+  bool GetPageSizeAndUniformity(pp::Size* size) override;
+  void AppendBlankPages(int num_pages) override;
+  void AppendPage(PDFEngine* engine, int index) override;
+  pp::Point GetScrollPosition() override;
+  void SetScrollPosition(const pp::Point& position) override;
+  bool IsProgressiveLoad() override;
+  std::string GetMetadata(const std::string& key) override;
 
   // DocumentLoader::Client implementation.
-  virtual pp::Instance* GetPluginInstance();
-  virtual pp::URLLoader CreateURLLoader();
-  virtual void OnPartialDocumentLoaded();
-  virtual void OnPendingRequestComplete();
-  virtual void OnNewDataAvailable();
-  virtual void OnDocumentComplete();
+  pp::Instance* GetPluginInstance() override;
+  pp::URLLoader CreateURLLoader() override;
+  void OnPartialDocumentLoaded() override;
+  void OnPendingRequestComplete() override;
+  void OnNewDataAvailable() override;
+  void OnDocumentComplete() override;
 
   void UnsupportedFeature(int type);
 
@@ -578,7 +577,7 @@ class PDFiumEngine : public PDFEngine,
   // IFSDK_PAUSE callbacks
   static FPDF_BOOL Pause_NeedToPauseNow(IFSDK_PAUSE* param);
 
-  PDFEngine::Client* client_;
+  PDFEngine::Client* const client_;
   pp::Size document_size_;  // Size of document in pixels.
 
   // The scroll position in screen coordinates.
@@ -735,29 +734,29 @@ class ScopedUnsupportedFeature {
 class PDFiumEngineExports : public PDFEngineExports {
  public:
   PDFiumEngineExports() {}
+
+// PDFEngineExports:
 #if defined(OS_WIN)
-  // See the definition of RenderPDFPageToDC in pdf.cc for details.
-  virtual bool RenderPDFPageToDC(const void* pdf_buffer,
-                                 int buffer_size,
-                                 int page_number,
-                                 const RenderingSettings& settings,
-                                 HDC dc);
-#endif  // OS_WIN
-  virtual bool RenderPDFPageToBitmap(const void* pdf_buffer,
-                                     int pdf_buffer_size,
-                                     int page_number,
-                                     const RenderingSettings& settings,
-                                     void* bitmap_buffer);
-
-  virtual bool GetPDFDocInfo(const void* pdf_buffer,
-                             int buffer_size,
-                             int* page_count,
-                             double* max_page_width);
-
-  // 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);
+  bool RenderPDFPageToDC(const void* pdf_buffer,
+                         int buffer_size,
+                         int page_number,
+                         const RenderingSettings& settings,
+                         HDC dc) override;
+#endif  // defined(OS_WIN)
+  bool RenderPDFPageToBitmap(const void* pdf_buffer,
+                             int pdf_buffer_size,
+                             int page_number,
+                             const RenderingSettings& settings,
+                             void* bitmap_buffer) override;
+  bool GetPDFDocInfo(const void* pdf_buffer,
+                     int buffer_size,
+                     int* page_count,
+                     double* max_page_width) override;
+  bool GetPDFPageSizeByIndex(const void* pdf_buffer,
+                             int pdf_buffer_size,
+                             int page_number,
+                             double* width,
+                             double* height) override;
 };
 
 }  // namespace chrome_pdf
diff --git a/pdf/preview_mode_client.h b/pdf/preview_mode_client.h
index 1f424a7..0127db9 100644
--- a/pdf/preview_mode_client.h
+++ b/pdf/preview_mode_client.h
@@ -22,57 +22,57 @@ class PreviewModeClient : public PDFEngine::Client {
     virtual void PreviewDocumentLoadFailed() = 0;
     virtual void PreviewDocumentLoadComplete() = 0;
   };
+
   explicit PreviewModeClient(Client* client);
-  virtual ~PreviewModeClient() {}
+  ~PreviewModeClient() override {}
 
   // PDFEngine::Client implementation.
-  virtual void DocumentSizeUpdated(const pp::Size& size);
-  virtual void Invalidate(const pp::Rect& rect);
-  virtual void Scroll(const pp::Point& point);
-  virtual void ScrollToX(int position);
-  virtual void ScrollToY(int position);
-  virtual void ScrollToPage(int page);
-  virtual void NavigateTo(const std::string& url, bool open_in_new_tab);
-  virtual void UpdateCursor(PP_CursorType_Dev cursor);
-  virtual void UpdateTickMarks(const std::vector<pp::Rect>& tickmarks);
-  virtual void NotifyNumberOfFindResultsChanged(int total,
-                                                bool final_result);
-  virtual void NotifySelectedFindResultChanged(int current_find_index);
-  virtual void GetDocumentPassword(
-      pp::CompletionCallbackWithOutput<pp::Var> callback);
-  virtual void Alert(const std::string& message);
-  virtual bool Confirm(const std::string& message);
-  virtual std::string Prompt(const std::string& question,
-                             const std::string& default_answer);
-  virtual std::string GetURL();
-  virtual void Email(const std::string& to,
-                     const std::string& cc,
-                     const std::string& bcc,
-                     const std::string& subject,
-                     const std::string& body);
-  virtual void Print();
-  virtual void SubmitForm(const std::string& url,
-                          const void* data,
-                          int length);
-  virtual std::string ShowFileSelectionDialog();
-  virtual pp::URLLoader CreateURLLoader();
-  virtual void ScheduleCallback(int id, int delay_in_ms);
-  virtual void SearchString(const base::char16* string,
-                            const base::char16* term,
-                            bool case_sensitive,
-                            std::vector<SearchStringResult>* results);
-  virtual void DocumentPaintOccurred();
-  virtual void DocumentLoadComplete(int page_count);
-  virtual void DocumentLoadFailed();
-  virtual pp::Instance* GetPluginInstance();
-  virtual void DocumentHasUnsupportedFeature(const std::string& feature);
-  virtual void DocumentLoadProgress(uint32_t available, uint32_t doc_size);
-  virtual void FormTextFieldFocusChange(bool in_focus);
-  virtual bool IsPrintPreview();
-  virtual uint32_t GetBackgroundColor();
+  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 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;
+  std::string GetURL() override;
+  void Email(const std::string& to,
+             const std::string& cc,
+             const std::string& bcc,
+             const std::string& subject,
+             const std::string& body) override;
+  void Print() override;
+  void SubmitForm(const std::string& url,
+                  const void* data,
+                  int length) override;
+  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;
+  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;
 
  private:
-  Client* client_;
+  Client* const client_;
 };
 
 }  // namespace chrome_pdf