Replace slashes in printing::SimplifyDocumentTitleWithLength().

Currently, the function replaces backslashes with underscores. Do the
same for forward slashes.

Bug: 1041897
Change-Id: I2063992a093d3a8f10f71b452617313783b6bcd1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2036352Reviewed-by: Will Harris <wfh@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#737879}

printing/printing_utils.cc

@@ -35,6 +35,8 @@ base::string16 SimplifyDocumentTitleWithLength(const base::string16& title,
       no_controls.end());
   base::ReplaceChars(no_controls, base::ASCIIToUTF16("\\"),
                      base::ASCIIToUTF16("_"), &no_controls);
+  base::ReplaceChars(no_controls, base::ASCIIToUTF16("/"),
+                     base::ASCIIToUTF16("_"), &no_controls);
   base::string16 result;
   gfx::ElideString(no_controls, length, &result);
   return result;

printing/printing_utils_unittest.cc

@@ -39,6 +39,7 @@ TEST(PrintingUtilsTest, SimplifyDocumentTitle) {
   EXPECT_EQ("abc...ij", Simplify("abcdefghij"));
   EXPECT_EQ("Controls", Simplify("C\ron\nt\15rols"));
   EXPECT_EQ("C:_foo_", Simplify("C:\\foo\\"));
+  EXPECT_EQ("C:_foo_", Simplify("C:/foo/"));
   EXPECT_EQ("", Simplify("\n\r\n\r\t\r"));
 }