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

net/test/embedded_test_server/http_request.cc

Index: net/test/embedded_test_server/http_request.cc
diff --git a/net/test/embedded_test_server/http_request.cc b/net/test/embedded_test_server/http_request.cc
index 8ac76d3592386d51a97967e70a51cecbcb2d211f..f1bf302a3fd7fe0485cacc4001b4d2ad801b390e 100644
--- a/net/test/embedded_test_server/http_request.cc
+++ b/net/test/embedded_test_server/http_request.cc
@@ -21,7 +21,7 @@ size_t kRequestSizeLimit = 64 * 1024 * 1024;  // 64 mb.
 // Helper function used to trim tokens in http request headers.
 std::string Trim(const std::string& value) {
   std::string result;
-  TrimString(value, " \t", &result);
+  base::TrimString(value, " \t", &result);
   return result;
 }