Add referrer & load flag support to BitmapFetcher class.

chrome/browser/bitmap_fetcher.cc

Index: chrome/browser/bitmap_fetcher.cc
diff --git a/chrome/browser/bitmap_fetcher.cc b/chrome/browser/bitmap_fetcher.cc
index c31b62aca2268e4b4f6b1cb212937588a2c6b5cb..771b2a9fb9212284741fb59a4dce81ac80d414de 100644
--- a/chrome/browser/bitmap_fetcher.cc
+++ b/chrome/browser/bitmap_fetcher.cc
@@ -4,7 +4,10 @@
 
 #include "chrome/browser/bitmap_fetcher.h"
 
+#include "base/command_line.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/common/content_switches.h"
+#include "net/base/load_flags.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "net/url_request/url_request_status.h"
@@ -19,12 +22,42 @@ BitmapFetcher::BitmapFetcher(const GURL& url,
 
 BitmapFetcher::~BitmapFetcher() {}
 
+
 void BitmapFetcher::Start(net::URLRequestContextGetter* request_context) {
+  Start(request_context, content::Referrer(), net::LOAD_NORMAL);
+}
+
+void BitmapFetcher::Start(net::URLRequestContextGetter* request_context,
+                          const content::Referrer& referrer,
+                          int load_flags) {
   if (url_fetcher_ != NULL)
     return;
 
   url_fetcher_.reset(net::URLFetcher::Create(url_, net::URLFetcher::GET, this));
   url_fetcher_->SetRequestContext(request_context);
+  url_fetcher_->SetLoadFlags(load_flags);

[Kibeom Kim (inactive), 2014/04/30 00:58:56]

Similar to ImageFetcher::StartDownload

https://chrome-internal.googlesource.com/bling/chromium/+/master/chrome/commo...

+
+  if (referrer.url.is_valid()) {
+    GURL referrer_url = referrer.ReferrerHeaderUrlForNavigation(url_);
+    if (!referrer_url.is_empty()) {
+      url_fetcher_->SetReferrer(referrer_url.spec());
+      net::URLRequest::ReferrerPolicy net_referrer_policy =
+          net::URLRequest::CLEAR_REFERRER_ON_TRANSITION_FROM_SECURE_TO_INSECURE;
+      switch (referrer.policy) {
+        case blink::WebReferrerPolicyDefault:
+          break;
+        case blink::WebReferrerPolicyAlways:
+        case blink::WebReferrerPolicyNever:
+        case blink::WebReferrerPolicyOrigin:
+          net_referrer_policy = net::URLRequest::NEVER_CLEAR_REFERRER;
+          break;
+        default:
+          NOTREACHED();
+      }
+      url_fetcher_->SetReferrerPolicy(net_referrer_policy);
+    }
+  }
+
   url_fetcher_->Start();
 }