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

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index ad8fee16a7ce064a1fdf89be4f3ec1648b929ef2..cc5372c7b08203859d5b365cb16ee9abca4ec458 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -81,6 +81,7 @@
 #include "third_party/WebKit/public/platform/WebURL.h"
 #include "third_party/WebKit/public/platform/WebURLError.h"
 #include "third_party/WebKit/public/platform/WebURLRequest.h"
+#include "third_party/WebKit/public/platform/WebURLResponse.h"
 #include "third_party/WebKit/public/web/WebCache.h"
 #include "third_party/WebKit/public/web/WebDataSource.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
@@ -1643,3 +1644,18 @@ void ChromeContentRendererClient::RecordRapporURL(const std::string& metric,
                                                   const GURL& url) {
   RenderThread::Get()->Send(new ChromeViewHostMsg_RecordRapporURL(metric, url));
 }
+
+
+void ChromeContentRendererClient::AddContextMenuProperties(
+    const blink::WebURLResponse& response,
+    std::map<std::string, std::string>* properties) {
+  DCHECK(properties);
+  const char lo_fi_header_key[] = "Chrome-Proxy";

[Lei Zhang, 2015/05/13 23:50:19]

Aren't the same values also seen in RenderViewContextMenu::AppendImageItems()
and DataReductionProxyRequestOptions::SetHeader() ?

[megjablon, 2015/05/14 19:26:25]

They're used little different in DRPRequestOptions.
@bengr can you suggest a good place to put these?

+  const char lo_fi_header_value[] = "q=low";
+  WebString header_key(ASCIIToUTF16(lo_fi_header_key));
+  if (!response.httpHeaderField(header_key).isNull() &&
+      response.httpHeaderField(header_key).utf8().find(lo_fi_header_value) !=
+          std::string::npos) {
+    (*properties)[lo_fi_header_key] = lo_fi_header_value;
+  }
+}