"Load image" context menu item to reload a LoFi image.

components/data_reduction_proxy/core/common/data_reduction_proxy_headers.cc

Index: components/data_reduction_proxy/core/common/data_reduction_proxy_headers.cc
diff --git a/components/data_reduction_proxy/core/common/data_reduction_proxy_headers.cc b/components/data_reduction_proxy/core/common/data_reduction_proxy_headers.cc
index 50c5e9634a4ca771eaa618a099db9890852060ef..35c93f51f860374837961bad1d6284f5620f6494 100644
--- a/components/data_reduction_proxy/core/common/data_reduction_proxy_headers.cc
+++ b/components/data_reduction_proxy/core/common/data_reduction_proxy_headers.cc
@@ -22,8 +22,11 @@ using base::TimeDelta;
 namespace {
 
 const char kChromeProxyHeader[] = "chrome-proxy";
+
 const char kActionValueDelimiter = '=';
 
+const char kChromeProxyLoFiDirective[] = "q=low";
+
 const char kChromeProxyActionBlockOnce[] = "block-once";
 const char kChromeProxyActionBlock[] = "block";
 const char kChromeProxyActionBypass[] = "bypass";
@@ -49,6 +52,14 @@ base::TimeDelta GetDefaultBypassDuration() {
 
 namespace data_reduction_proxy {
 
+const char* chrome_proxy_header() {
+  return kChromeProxyHeader;
+}
+
+const char* chrome_proxy_lo_fi_directive() {
+  return kChromeProxyLoFiDirective;
+}
+
 bool GetDataReductionProxyActionValue(
     const net::HttpResponseHeaders* headers,
     const std::string& action_prefix,