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

components/data_reduction_proxy/core/common/data_reduction_proxy_headers.h

Index: components/data_reduction_proxy/core/common/data_reduction_proxy_headers.h
diff --git a/components/data_reduction_proxy/core/common/data_reduction_proxy_headers.h b/components/data_reduction_proxy/core/common/data_reduction_proxy_headers.h
index ab94b0f82fa714814fd33c6dcb31ea02c3f28f3e..e92be3ab9d3b2821128fc2d28a83e4c0ec1fca21 100644
--- a/components/data_reduction_proxy/core/common/data_reduction_proxy_headers.h
+++ b/components/data_reduction_proxy/core/common/data_reduction_proxy_headers.h
@@ -23,6 +23,13 @@ namespace data_reduction_proxy {
 
 class DataReductionProxyEventCreator;
 
+// The header used for data reduction proxy requests and responses.
+extern const char kChromeProxyHeader[];
+
+// The Chrome-Proxy directive used by data reduction proxy Lo-Fi requests and
+// responses.
+extern const char kChromeProxyLoFiDirective[];
+
 // Values of the UMA DataReductionProxy.BypassType{Primary|Fallback} and
 // DataReductionProxy.BlockType{Primary|Fallback} histograms. This enum must
 // remain synchronized with the enum of the same name in