Reland of place string::find(prefix) == 0 pattern with base::StartsWith().

chrome/browser/extensions/api/cookies/cookies_helpers.cc

Index: chrome/browser/extensions/api/cookies/cookies_helpers.cc
diff --git a/chrome/browser/extensions/api/cookies/cookies_helpers.cc b/chrome/browser/extensions/api/cookies/cookies_helpers.cc
index 0ca4569488167234e3bc2f3384aa76fddbcc91af..b5073942cf1c2466f2300b95532c1f88bd419836 100644
--- a/chrome/browser/extensions/api/cookies/cookies_helpers.cc
+++ b/chrome/browser/extensions/api/cookies/cookies_helpers.cc
@@ -134,7 +134,9 @@
   const std::string scheme =
       cookie.IsSecure() ? url::kHttpsScheme : url::kHttpScheme;
   const std::string host =
-      domain_key.find('.') != 0 ? domain_key : domain_key.substr(1);
+      base::StartsWith(domain_key, ".", base::CompareCase::SENSITIVE)
+          ? domain_key.substr(1)
+          : domain_key;
   return GURL(scheme + url::kStandardSchemeSeparator + host + "/");
 }