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

chrome/browser/web_applications/web_app.cc

Index: chrome/browser/web_applications/web_app.cc
diff --git a/chrome/browser/web_applications/web_app.cc b/chrome/browser/web_applications/web_app.cc
index 893ee6f3c71227999fe707d714766ea59a407f42..49193af10b8b94725da8b6ea5068b191e4a22f14 100644
--- a/chrome/browser/web_applications/web_app.cc
+++ b/chrome/browser/web_applications/web_app.cc
@@ -231,7 +231,7 @@ void GetIconsInfo(const WebApplicationInfo& app_info,
 #if defined(OS_LINUX)
 std::string GetWMClassFromAppName(std::string app_name) {
   file_util::ReplaceIllegalCharactersInPath(&app_name, '_');
-  TrimString(app_name, "_", &app_name);
+  base::TrimString(app_name, "_", &app_name);
   return app_name;
 }
 #endif