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

chrome/browser/pdf/pdf_extension_test.cc

Index: chrome/browser/pdf/pdf_extension_test.cc
diff --git a/chrome/browser/pdf/pdf_extension_test.cc b/chrome/browser/pdf/pdf_extension_test.cc
index b90517984a16bd114c4a23101c6fc67ce236a053..3ddc059fda093f979b65af8ef5980e6e922f2263 100644
--- a/chrome/browser/pdf/pdf_extension_test.cc
+++ b/chrome/browser/pdf/pdf_extension_test.cc
@@ -330,6 +330,10 @@ IN_PROC_BROWSER_TEST_F(PDFExtensionTest, Title) {
   RunTestsInFile("title_test.js", "test-title.pdf");
 }
 
+IN_PROC_BROWSER_TEST_F(PDFExtensionTest, WhitespaceTitle) {
+  RunTestsInFile("whitespace_title_test.js", "test-whitespace-title.pdf");
+}
+
 // Ensure that the internal PDF plugin application/x-google-chrome-pdf won't be
 // loaded if it's not loaded in the chrome extension page.
 IN_PROC_BROWSER_TEST_F(PDFExtensionTest, EnsureInternalPluginDisabled) {
@@ -420,3 +424,7 @@ IN_PROC_BROWSER_TEST_F(MaterialPDFExtensionTest, ToolbarManager) {
 IN_PROC_BROWSER_TEST_F(MaterialPDFExtensionTest, Title) {
   RunTestsInFile("title_test.js", "test-title.pdf");
 }
+
+IN_PROC_BROWSER_TEST_F(MaterialPDFExtensionTest, WhitespaceTitle) {
+  RunTestsInFile("whitespace_title_test.js", "test-whitespace-title.pdf");
+}