Correcting the version field in the Chrome-Proxy header to be the chromium build and patch number.

chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.cc

Index: chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.cc
diff --git a/chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.cc b/chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.cc
index abdbe4bd60e623134369db81ff2249744cc6cdaf..ac67a8103aed61f608319cbfb16c53938c0023b4 100644
--- a/chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.cc
+++ b/chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.cc
@@ -4,6 +4,8 @@
 
 #include "chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.h"
 
+#include "base/strings/string_split.h"
+#include "base/strings/string_util.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_configurator.h"
 #include "chrome/browser/profiles/profile.h"
@@ -38,3 +40,26 @@ void DataReductionProxyChromeSettings::InitDataReductionProxySettings(
   SetDataReductionProxyAlternativeEnabled(
       DataReductionProxyParams::IsIncludedInAlternativeFieldTrial());
 }
+
+// static
+std::string DataReductionProxyChromeSettings::GetBuildAndPatchNumber() {
+  chrome::VersionInfo version_info;
+  std::vector<std::string> version_parts;
+  base::SplitString(version_info.Version(), '.', &version_parts);
+  if (version_parts.size() != 4) {
+    return "";
+  }
+  version_parts.erase(version_parts.begin(), version_parts.begin() + 2);
+  return JoinString(version_parts, '.');
+}
+
+// static
+std::string DataReductionProxyChromeSettings::GetClient() {
+#if defined(OS_ANDROID)
+  return data_reduction_proxy::kClientChromeAndroid;
+#elif defined(OS_IOS)
+  return data_reduction_proxy::kClientChromeIOS;
+#else
+  return "";
+#endif
+}