PDF: Strip whitespace when determining whether a PDF's title is empty.

chrome/test/data/pdf/whitespace_title_test.js

Index: chrome/test/data/pdf/whitespace_title_test.js
diff --git a/chrome/test/data/pdf/title_test.js b/chrome/test/data/pdf/whitespace_title_test.js
similarity index 72%
copy from chrome/test/data/pdf/title_test.js
copy to chrome/test/data/pdf/whitespace_title_test.js
index d4262bed97b817441a94f34aad3a165ba5164407..3d5b9ca7818bf41abb13fa53b835673d15e3ab0b 100644
--- a/chrome/test/data/pdf/title_test.js
+++ b/chrome/test/data/pdf/whitespace_title_test.js
@@ -4,10 +4,10 @@
 
 var tests = [
   /**
-   * Test that the correct title is displayed for test-title.pdf.
+   * Test that the correct title is displayed for test-whitespace-title.pdf.
    */
   function testHasCorrectTitle() {
-    chrome.test.assertEq('PDF title test', document.title);
+    chrome.test.assertEq('test-whitespace-title.pdf', document.title);
 
     chrome.test.succeed();
   }