[Presubmit] check for single quotes in html properties

chrome/browser/web_dev_style/test_util.py

Index: chrome/browser/web_dev_style/test_util.py
diff --git a/chrome/browser/web_dev_style/test_util.py b/chrome/browser/web_dev_style/test_util.py
index a613d75d8e8e0af57a78334303fc3b33a4b842bf..503db37fe730a536b622373a73ca153873ff178b 100644
--- a/chrome/browser/web_dev_style/test_util.py
+++ b/chrome/browser/web_dev_style/test_util.py
@@ -6,5 +6,10 @@
 def GetHighlight(line, error):
   """Returns the substring of |line| that is highlighted in |error|."""
   error_lines = error.split('\n')
+  # TODO(dschuyler): Splitting the error on \n will prevent index(line)
+  # from finding the line. As a workaround, return the whole, unfiltered
+  # line.
+  if line not in error_lines:
+    return line
   highlight = error_lines[error_lines.index(line) + 1]
   return ''.join(ch1 for (ch1, ch2) in zip(line, highlight) if ch2 == '^')