PDF: Check the loaded URL in sendScriptingMessage_().

chrome/browser/resources/pdf/pdf.js

Index: chrome/browser/resources/pdf/pdf.js
diff --git a/chrome/browser/resources/pdf/pdf.js b/chrome/browser/resources/pdf/pdf.js
index 9805660b562c34e82cae189e4670abaace68eb8e..0a24f7e346e3f8c8866c6b54aa6a58a0e12920c0 100644
--- a/chrome/browser/resources/pdf/pdf.js
+++ b/chrome/browser/resources/pdf/pdf.js
@@ -94,6 +94,7 @@ PDFViewer.DARK_BACKGROUND_COLOR = '0xFF525659';
 function PDFViewer(browserApi) {
   this.browserApi_ = browserApi;
   this.originalUrl_ = this.browserApi_.getStreamInfo().originalUrl;
+  this.actualUrl_ = null;
   this.loadState_ = LoadState.LOADING;
   this.parentWindow_ = null;
   this.parentOrigin_ = null;
@@ -602,6 +603,9 @@ PDFViewer.prototype = {
       case 'goToPage':
         this.viewport_.goToPage(message.data.page);
         break;
+      case 'gotActualURL':
+        this.actualUrl_ = message.data.actualURL;
+        break;
       case 'loadProgress':
         this.updateProgress_(message.data.progress);
         break;
@@ -842,6 +846,8 @@ PDFViewer.prototype = {
         targetOrigin = this.parentOrigin_;
       else if (message.type == 'documentLoaded')
         targetOrigin = '*';
+      else if (this.actualUrl_)
+        targetOrigin = this.actualUrl_;
       else
         targetOrigin = this.originalUrl_;
       this.parentWindow_.postMessage(message, targetOrigin);