Move IsAboutBlank from url_utils to GURL

url/gurl.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "url/gurl.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <ostream>
@@ skipping 330 matching lines @@
   other.spec_[other.parsed_.path.begin] = '/';
   other.parsed_.path.len = 1;
   other.spec_.resize(other.parsed_.path.begin + 1);
   return other;
 }
 
 bool GURL::IsStandard() const {
   return url::IsStandard(spec_.data(), parsed_.scheme);
 }
 
+bool GURL::IsAboutBlank() const {
+  if (!SchemeIs(url::kAboutScheme))
+    return false;
+
+  if (has_host() || has_username() || has_password() || has_port())
+    return false;
+
+  if (path() != url::kAboutBlankPath && path() != url::kAboutBlankWithHashPath)
+    return false;
+
+  return true;
+}
+
 bool GURL::SchemeIs(base::StringPiece lower_ascii_scheme) const {
   DCHECK(base::IsStringASCII(lower_ascii_scheme));
   DCHECK(base::ToLowerASCII(lower_ascii_scheme) == lower_ascii_scheme);
 
   if (parsed_.scheme.len <= 0)
     return lower_ascii_scheme.empty();
   return scheme_piece() == lower_ascii_scheme;
 }
 
 bool GURL::SchemeIsHTTPOrHTTPS() const {
@@ skipping 141 matching lines @@
 }
 
 bool operator==(const GURL& x, const base::StringPiece& spec) {
   DCHECK_EQ(GURL(spec).possibly_invalid_spec(), spec);
   return x.possibly_invalid_spec() == spec;
 }
 
 bool operator!=(const GURL& x, const base::StringPiece& spec) {
   return !(x == spec);
 }