Move RemoveChars, ReplaceChars, TrimString, and TruncateUTF8ToByteSize to base namespace.

chrome/renderer/safe_browsing/phishing_url_feature_extractor.cc

Index: chrome/renderer/safe_browsing/phishing_url_feature_extractor.cc
diff --git a/chrome/renderer/safe_browsing/phishing_url_feature_extractor.cc b/chrome/renderer/safe_browsing/phishing_url_feature_extractor.cc
index 11d85685ed63afece82555581070097fa74f5300..e35363638e3126c57345db537db04c4c7c650241 100644
--- a/chrome/renderer/safe_browsing/phishing_url_feature_extractor.cc
+++ b/chrome/renderer/safe_browsing/phishing_url_feature_extractor.cc
@@ -30,8 +30,9 @@ bool PhishingUrlFeatureExtractor::ExtractFeatures(const GURL& url,
     if (!features->AddBooleanFeature(features::kUrlHostIsIpAddress))
       return false;
   } else {
+    // Remove any leading/trailing dots.
     std::string host;
-    TrimString(url.host(), ".", &host);  // Remove any leading/trailing dots.
+    base::TrimString(url.host(), ".", &host);
 
     // TODO(bryner): Ensure that the url encoding is consistent with
     // the features in the model.