Revert "Adds UMA to measure when the data reduction proxy via header is missing"

components/data_reduction_proxy/browser/data_reduction_proxy_protocol_unittest.cc

Index: components/data_reduction_proxy/browser/data_reduction_proxy_protocol_unittest.cc
diff --git a/components/data_reduction_proxy/browser/data_reduction_proxy_protocol_unittest.cc b/components/data_reduction_proxy/browser/data_reduction_proxy_protocol_unittest.cc
index d54aa86be3dca6bd8b2266e6d84fdd87fdd96515..c4c13ee5bc8922a5f7218a728614e476e6707d26 100644
--- a/components/data_reduction_proxy/browser/data_reduction_proxy_protocol_unittest.cc
+++ b/components/data_reduction_proxy/browser/data_reduction_proxy_protocol_unittest.cc
@@ -13,7 +13,6 @@
 #include "base/strings/stringprintf.h"
 #include "components/data_reduction_proxy/browser/data_reduction_proxy_params_test_utils.h"
 #include "components/data_reduction_proxy/common/data_reduction_proxy_headers.h"
-#include "components/data_reduction_proxy/common/data_reduction_proxy_headers_test_utils.h"
 #include "net/base/completion_callback.h"
 #include "net/base/host_port_pair.h"
 #include "net/base/load_flags.h"
@@ -40,6 +39,18 @@ using net::URLRequest;
 using net::TestURLRequestContext;
 
 
+namespace {
+// Transform "normal"-looking headers (\n-separated) to the appropriate
+// input format for ParseRawHeaders (\0-separated).
+void HeadersToRaw(std::string* headers) {
+  std::replace(headers->begin(), headers->end(), '\n', '\0');
+  if (!headers->empty())
+    *headers += '\0';
+}
+
+} // namespace
+
+
 namespace data_reduction_proxy {
 
 // A test network delegate that exercises the bypass logic of the data