Update PDF accessibility when zoom level changes

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 61 matching lines @@
       const PP_PrintPageNumberRange_Dev* page_ranges,
       uint32_t page_range_count) override;
   void PrintEnd() override;
   bool IsPrintScalingDisabled() override;
 
   // pp::Private implementation.
   pp::Var GetLinkAtPosition(const pp::Point& point);
   void GetPrintPresetOptionsFromDocument(PP_PdfPrintPresetOptions_Dev* options);
   void EnableAccessibility();
 
-  // Start loading accessibility information.
-  void LoadAccessibility();
-
-  // Send accessibility information about the given page index.
-  void SendNextAccessibilityPage(int32_t page_index);
-
   void FlushCallback(int32_t result);
   void DidOpen(int32_t result);
   void DidOpenPreview(int32_t result);
 
   // Called when the timer is fired.
   void OnClientTimerFired(int32_t id);
 
   // Called to print without re-entrancy issues.
   void OnPrint(int32_t);
 
@@ skipping 77 matching lines @@
                        void (OutOfProcessInstance::* method)(int32_t));
 
   // Creates a URL loader and allows it to access all urls, i.e. not just the
   // frame's origin.
   pp::URLLoader CreateURLLoaderInternal();
 
   void FormDidOpen(int32_t result);
 
   void UserMetricsRecordAction(const std::string& action);
 
+  // Start loading accessibility information.
+  void LoadAccessibility();
+
+  // Send accessibility information about the given page index.
+  void SendNextAccessibilityPage(int32_t page_index);
+
+  // Send the accessibility information about the current viewport. This is
+  // done once when accessibility is first loaded and again when the geometry
+  // changes.
+  void SendAccessibilityViewportInfo();
+
   enum DocumentLoadState {
     LOAD_STATE_LOADING,
     LOAD_STATE_COMPLETE,
     LOAD_STATE_FAILED,
   };
 
   // Set new zoom scale.
   void SetZoom(double scale);
 
   // Reduces the document to 1 page and appends |print_preview_page_count_|
@@ skipping 162 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_