Add private PPAPI interfaces for PDFium accessibility.

ppapi/proxy/pdf_resource.cc

Index: ppapi/proxy/pdf_resource.cc
diff --git a/ppapi/proxy/pdf_resource.cc b/ppapi/proxy/pdf_resource.cc
index 914e6957e21e569feebec0fa640e28e32ce07e16..9187a72e7a3982df9b1e272ab7f8eb81101f4a58 100644
--- a/ppapi/proxy/pdf_resource.cc
+++ b/ppapi/proxy/pdf_resource.cc
@@ -168,5 +168,35 @@ void PDFResource::GetV8ExternalSnapshotData(const char** natives_data_out,
       natives_data_out, natives_size_out, snapshot_data_out, snapshot_size_out);
 }
 
+void PDFResource::SetAccessibilityDocInfo(
+    PP_PrivateAccessibilityDocInfo* doc_info) {
+  Post(RENDERER, PpapiHostMsg_PDF_SetAccessibilityDocInfo(*doc_info));
+}
+
+void PDFResource::SetAccessibilityViewportInfo(
+    PP_PrivateAccessibilityViewportInfo* viewport_info) {
+  Post(RENDERER, PpapiHostMsg_PDF_SetAccessibilityViewportInfo(*viewport_info));
+}
+
+void PDFResource::SetAccessibilityPageInfo(
+    uint32_t page_index,
+    PP_PrivateAccessibilityPageInfo* page_info) {
+  Post(RENDERER, PpapiHostMsg_PDF_SetAccessibilityPageInfo(
+      page_index, *page_info));
+}
+
+void PDFResource::SetAccessibilityTextRunInfo(
+    uint32_t page_index,
+    uint32_t text_run_index,
+    PP_PrivateAccessibilityTextRunInfo* text_run_info,
+    PP_PrivateAccessibilityCharInfo chars[]) {
+  std::vector<PP_PrivateAccessibilityCharInfo> char_vector;
+  char_vector.resize(text_run_info->len);
+  for (size_t i = 0; i < text_run_info->len; ++i)
+    char_vector[i] = chars[i];
+  Post(RENDERER, PpapiHostMsg_PDF_SetAccessibilityTextRunInfo(
+      page_index, text_run_index, *text_run_info, char_vector));
+}
+
 }  // namespace proxy
 }  // namespace ppapi