Add private PPAPI interfaces for PDFium accessibility.

components/pdf/renderer/pepper_pdf_host.cc

Index: components/pdf/renderer/pepper_pdf_host.cc
diff --git a/components/pdf/renderer/pepper_pdf_host.cc b/components/pdf/renderer/pepper_pdf_host.cc
index ce0eddba0a51df1a5ce3d22f5df153679cbf3509..f8cef1eff58f5875af3d63d55108fe239346d4a7 100644
--- a/components/pdf/renderer/pepper_pdf_host.cc
+++ b/components/pdf/renderer/pepper_pdf_host.cc
@@ -79,6 +79,18 @@ int32_t PepperPDFHost::OnResourceMessageReceived(
                                       OnHostMsgSetLinkUnderCursor)
     PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_PDF_SetContentRestriction,
                                       OnHostMsgSetContentRestriction)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(
+        PpapiHostMsg_PDF_SetAccessibilityViewportInfo,
+        OnHostMsgSetAccessibilityViewportInfo)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(
+        PpapiHostMsg_PDF_SetAccessibilityDocInfo,
+        OnHostMsgSetAccessibilityDocInfo)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(
+        PpapiHostMsg_PDF_SetAccessibilityPageInfo,
+        OnHostMsgSetAccessibilityPageInfo)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(
+        PpapiHostMsg_PDF_SetAccessibilityTextRunInfo,
+        OnHostMsgSetAccessibilityTextRunInfo)
   PPAPI_END_MESSAGE_MAP()
   return PP_ERROR_FAILED;
 }
@@ -183,4 +195,32 @@ int32_t PepperPDFHost::OnHostMsgSetLinkUnderCursor(
   return PP_OK;
 }
 
+int32_t PepperPDFHost::OnHostMsgSetAccessibilityViewportInfo(
+    ppapi::host::HostMessageContext* context,
+    const PP_PrivateAccessibilityViewportInfo& viewport_info) {
+  return PP_OK;
+}
+
+int32_t PepperPDFHost::OnHostMsgSetAccessibilityDocInfo(
+    ppapi::host::HostMessageContext* context,
+    const PP_PrivateAccessibilityDocInfo& doc_info) {
+  return PP_OK;
+}
+
+int32_t PepperPDFHost::OnHostMsgSetAccessibilityPageInfo(
+    ppapi::host::HostMessageContext* context,
+    uint32_t page_index,
+    const PP_PrivateAccessibilityPageInfo& page_info) {
+  return PP_OK;
+}
+
+int32_t PepperPDFHost::OnHostMsgSetAccessibilityTextRunInfo(
+    ppapi::host::HostMessageContext* context,
+    uint32_t page_index,
+    uint32_t text_run_index,
+    const PP_PrivateAccessibilityTextRunInfo& text_run_info,
+    const std::vector<PP_PrivateAccessibilityCharInfo>& chars) {
+  return PP_OK;
+}
+
 }  // namespace pdf