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

chrome/browser/guestview/webview/webview_guest.cc

Index: chrome/browser/guestview/webview/webview_guest.cc
diff --git a/chrome/browser/guestview/webview/webview_guest.cc b/chrome/browser/guestview/webview/webview_guest.cc
index 6c51c7debcd145d4d5d246b31a88873b44ac8661..1bb061eed922a02b05918411b874948e99250300 100644
--- a/chrome/browser/guestview/webview/webview_guest.cc
+++ b/chrome/browser/guestview/webview/webview_guest.cc
@@ -583,7 +583,7 @@ void WebViewGuest::DidFailProvisionalLoad(
     content::RenderViewHost* render_view_host) {
   // Translate the |error_code| into an error string.
   std::string error_type;
-  RemoveChars(net::ErrorToString(error_code), "net::", &error_type);
+  base::RemoveChars(net::ErrorToString(error_code), "net::", &error_type);
   LoadAbort(is_main_frame, validated_url, error_type);
 }