Use string for Histogram names since these are all ASCII anyway wide-characte...

net/proxy/proxy_resolver_winhttp.cc

Index: net/proxy/proxy_resolver_winhttp.cc
===================================================================
--- net/proxy/proxy_resolver_winhttp.cc	(revision 10269)
+++ net/proxy/proxy_resolver_winhttp.cc	(working copy)
@@ -27,9 +27,9 @@
   // Record separately success and failure times since they will have very
   // different characteristics.
   if (rv) {
-    UMA_HISTOGRAM_LONG_TIMES(L"Net.GetProxyForUrl_OK", time_delta);
+    UMA_HISTOGRAM_LONG_TIMES("Net.GetProxyForUrl_OK", time_delta);
   } else {
-    UMA_HISTOGRAM_LONG_TIMES(L"Net.GetProxyForUrl_FAIL", time_delta);
+    UMA_HISTOGRAM_LONG_TIMES("Net.GetProxyForUrl_FAIL", time_delta);
   }
   return rv;
 }
@@ -159,4 +159,3 @@
 }
 
 }  // namespace net
-