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

chrome/installer/util/shell_util.cc

Index: chrome/installer/util/shell_util.cc
diff --git a/chrome/installer/util/shell_util.cc b/chrome/installer/util/shell_util.cc
index 2b4aafdfa5874b46af2cbe37ecb1c0ba705d8107..2802b49a82b3106375ff8990f646ebb7fc132285 100644
--- a/chrome/installer/util/shell_util.cc
+++ b/chrome/installer/util/shell_util.cc
@@ -1690,7 +1690,7 @@ string16 ShellUtil::BuildAppModelId(
     }
   }
   // No spaces are allowed in the AppUserModelId according to MSDN.
-  ReplaceChars(app_id, L" ", L"_", &app_id);
+  base::ReplaceChars(app_id, L" ", L"_", &app_id);
   return app_id;
 }