Update SplitString calls in chrome.

chrome/renderer/page_load_histograms.cc

Index: chrome/renderer/page_load_histograms.cc
diff --git a/chrome/renderer/page_load_histograms.cc b/chrome/renderer/page_load_histograms.cc
index 78c1d5f2a73eb2c0376d848c42d802752249a49a..f032204224350963e36be4e6bbe24806bbf9486f 100644
--- a/chrome/renderer/page_load_histograms.cc
+++ b/chrome/renderer/page_load_histograms.cc
@@ -165,9 +165,9 @@ bool ViaHeaderContains(WebFrame* frame, const std::string& via_value) {
   // separated by a comma corresponds to a proxy. The value added by a proxy is
   // not expected to contain any commas.
   // Example., Via: 1.0 Compression proxy, 1.1 Google Instant Proxy Preview
-  base::SplitString(
+  values = base::SplitString(
       frame->dataSource()->response().httpHeaderField(kViaHeaderName).utf8(),
-      ',', &values);
+      ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
   return std::find(values.begin(), values.end(), via_value) != values.end();
 }