Escapes backslash, colon, comma, equals and semicolon in IAccessible2 string attributes.

content/browser/accessibility/browser_accessibility_win.h

Index: content/browser/accessibility/browser_accessibility_win.h
diff --git a/content/browser/accessibility/browser_accessibility_win.h b/content/browser/accessibility/browser_accessibility_win.h
index fdde33e55d046003cbf6338780e9dbb3858c91a8..2632c4d087094bbe5d4fdce5616114b047d91752 100644
--- a/content/browser/accessibility/browser_accessibility_win.h
+++ b/content/browser/accessibility/browser_accessibility_win.h
@@ -751,6 +751,12 @@ BrowserAccessibilityWin
       ui::AXStringAttribute attribute,
       BSTR* value_bstr);
 
+  // Escapes the following characters with backslash: backslash, colon, comma,
+  // equals and semicolon.
+  // It's okay for input to be the same as output.
+  static void SanitizeStringAttributeForIA2(const base::string16& input,
+                                            base::string16* output);
+
   // If the string attribute |attribute| is present, add its value as an
   // IAccessible2 attribute with the name |ia2_attr|.
   void StringAttributeToIA2(ui::AXStringAttribute attribute,