Use StringView for String and AtomicString operator==.

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

Index: third_party/WebKit/Source/wtf/text/WTFString.h
diff --git a/third_party/WebKit/Source/wtf/text/WTFString.h b/third_party/WebKit/Source/wtf/text/WTFString.h
index 0e02b8902dc3e5af8785a9aef81aedd68d50f3db..f2efeb157d943d89c89373fdc3b993e65836009f 100644
--- a/third_party/WebKit/Source/wtf/text/WTFString.h
+++ b/third_party/WebKit/Source/wtf/text/WTFString.h
@@ -442,52 +442,26 @@ class WTF_EXPORT String {
 #undef DISPATCH_CASE_OP
 
 inline bool operator==(const String& a, const String& b) {
+  // We don't use equalStringView here since we want the isAtomic() fast path
+  // inside WTF::equal.
   return equal(a.impl(), b.impl());
 }
-inline bool operator==(const String& a, const LChar* b) {
-  return equal(a.impl(), b);
-}
 inline bool operator==(const String& a, const char* b) {
-  return equal(a.impl(), reinterpret_cast<const LChar*>(b));
-}
-inline bool operator==(const LChar* a, const String& b) {
-  return equal(a, b.impl());
+  return equalStringView(a, b);
 }
 inline bool operator==(const char* a, const String& b) {
-  return equal(reinterpret_cast<const LChar*>(a), b.impl());
-}
-template <size_t inlineCapacity>
-inline bool operator==(const Vector<char, inlineCapacity>& a, const String& b) {
-  return equal(b.impl(), a.data(), a.size());
-}
-template <size_t inlineCapacity>
-inline bool operator==(const String& a, const Vector<char, inlineCapacity>& b) {
   return b == a;
 }
 
 inline bool operator!=(const String& a, const String& b) {
-  return !equal(a.impl(), b.impl());
-}
-inline bool operator!=(const String& a, const LChar* b) {
-  return !equal(a.impl(), b);
+  return !(a == b);
 }
 inline bool operator!=(const String& a, const char* b) {
-  return !equal(a.impl(), reinterpret_cast<const LChar*>(b));
-}
-inline bool operator!=(const LChar* a, const String& b) {
-  return !equal(a, b.impl());
+  return !(a == b);
 }
 inline bool operator!=(const char* a, const String& b) {
-  return !equal(reinterpret_cast<const LChar*>(a), b.impl());
-}
-template <size_t inlineCapacity>
-inline bool operator!=(const Vector<char, inlineCapacity>& a, const String& b) {
   return !(a == b);
 }
-template <size_t inlineCapacity>
-inline bool operator!=(const String& a, const Vector<char, inlineCapacity>& b) {
-  return b != a;
-}
 
 inline bool equalPossiblyIgnoringCase(const String& a,
                                       const String& b,