Use StringView for String::findIgnoringCase and findIgnoringASCIICase.

third_party/WebKit/Source/wtf/text/AtomicString.h

Index: third_party/WebKit/Source/wtf/text/AtomicString.h
diff --git a/third_party/WebKit/Source/wtf/text/AtomicString.h b/third_party/WebKit/Source/wtf/text/AtomicString.h
index 2dc75a75f35ef7499262a59cca3aedf2f9ae93e6..a1d853f1b6c4feda488b39a78cd181c6785e25d0 100644
--- a/third_party/WebKit/Source/wtf/text/AtomicString.h
+++ b/third_party/WebKit/Source/wtf/text/AtomicString.h
@@ -86,6 +86,14 @@ public:
     size_t find(const StringView& value, unsigned start = 0, TextCaseSensitivity caseSensitivity = TextCaseSensitive) const
         { return m_string.find(value, start, caseSensitivity); }
 
+    // Unicode aware case insensitive string matching.
+    size_t findIgnoringCase(const StringView& value, unsigned start = 0) const
+        { return m_string.findIgnoringCase(value, start); }
+
+    // ASCII case insensitive string matching.
+    size_t findIgnoringASCIICase(const StringView& value, unsigned start = 0) const
+        { return m_string.findIgnoringASCIICase(value, start); }
+
     bool contains(char c) const { return find(c) != kNotFound; }
     bool contains(const StringView& value, TextCaseSensitivity caseSensitivity = TextCaseSensitive) const
         { return find(value, 0, caseSensitivity) != kNotFound; }