Add private PPAPI interfaces for PDFium accessibility.

pdf/pdfium/pdfium_engine.cc

Index: pdf/pdfium/pdfium_engine.cc
diff --git a/pdf/pdfium/pdfium_engine.cc b/pdf/pdfium/pdfium_engine.cc
index 5ee7e623ac43e20b3098cb3097ff2bec45443f99..b020fe5062e24fa5f393403e90ac23980c48cd26 100644
--- a/pdf/pdfium/pdfium_engine.cc
+++ b/pdf/pdfium/pdfium_engine.cc
@@ -2270,6 +2270,10 @@ pp::Rect PDFiumEngine::GetPageRect(int index) {
   return rc;
 }
 
+pp::Rect PDFiumEngine::GetPageBoundsRect(int index) {
+  return pages_[index]->rect();
+}
+
 pp::Rect PDFiumEngine::GetPageContentsRect(int index) {
   return GetScreenRect(pages_[index]->rect());
 }
@@ -2303,6 +2307,31 @@ std::string PDFiumEngine::GetPageAsJSON(int index) {
   return page_json;
 }
 
+int PDFiumEngine::GetCharCount(int page_index) {
+  DCHECK(page_index >= 0 && page_index < static_cast<int>(pages_.size()));
+  return pages_[page_index]->GetCharCount();
+}
+
+double PDFiumEngine::GetCharWidth(int page_index, int char_index) {
+  DCHECK(page_index >= 0 && page_index < static_cast<int>(pages_.size()));
+  return pages_[page_index]->GetCharWidth(char_index);
+}
+
+uint32_t PDFiumEngine::GetCharUnicode(int page_index, int char_index) {
+  DCHECK(page_index >= 0 && page_index < static_cast<int>(pages_.size()));
+  return pages_[page_index]->GetCharUnicode(char_index);
+}
+
+void PDFiumEngine::GetTextRunInfo(int page_index,
+                                  int start_char_index,
+                                  uint32_t* out_len,
+                                  double* out_font_size,
+                                  pp::FloatRect* out_bounds) {
+  DCHECK(page_index >= 0 && page_index < static_cast<int>(pages_.size()));
+  return pages_[page_index]->GetTextRunInfo(start_char_index, out_len,
+                                            out_font_size, out_bounds);
+}
+
 bool PDFiumEngine::GetPrintScaling() {
   return !!FPDF_VIEWERREF_GetPrintScaling(doc_);
 }