Reload favicon from HTTP cache on Ctrl+Refresh

chrome/browser/favicon/favicon_tab_helper.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/favicon/favicon_tab_helper.h"
 
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/favicon/chrome_favicon_client.h"
 #include "chrome/browser/favicon/chrome_favicon_client_factory.h"
 #include "chrome/browser/favicon/favicon_handler.h"
@@ skipping 135 matching lines @@
 }
 
 int FaviconTabHelper::StartDownload(const GURL& url, int max_image_size) {
   FaviconService* favicon_service = FaviconServiceFactory::GetForProfile(
       profile_->GetOriginalProfile(), ServiceAccessType::IMPLICIT_ACCESS);
   if (favicon_service && favicon_service->WasUnableToDownloadFavicon(url)) {
     DVLOG(1) << "Skip Failed FavIcon: " << url;
     return 0;
   }
 
+  blink::WebURLRequest::CachePolicy cache_policy =
+      (bypass_cache_page_url_ == GetActiveURL())
+          ? blink::WebURLRequest::ReloadBypassingCache
+          : blink::WebURLRequest::UseProtocolCachePolicy;
+  bypass_cache_page_url_ = GURL();
+
   return web_contents()->DownloadImage(
-      url,
-      true,
-      max_image_size,
-      base::Bind(&FaviconTabHelper::DidDownloadFavicon,base::Unretained(this)));
+      url, true, max_image_size, cache_policy,
+      base::Bind(&FaviconTabHelper::DidDownloadFavicon,
+                 base::Unretained(this)));
 }
 
 bool FaviconTabHelper::IsOffTheRecord() {
   DCHECK(web_contents());
   return web_contents()->GetBrowserContext()->IsOffTheRecord();
 }
 
 const gfx::Image FaviconTabHelper::GetActiveFaviconImage() {
   return GetFaviconStatus().image;
 }
@@ skipping 52 matching lines @@
 content::FaviconStatus& FaviconTabHelper::GetFaviconStatus() {
   DCHECK(web_contents()->GetController().GetActiveEntry());
   return web_contents()->GetController().GetActiveEntry()->GetFavicon();
 }
 
 void FaviconTabHelper::DidStartNavigationToPendingEntry(
     const GURL& url,
     NavigationController::ReloadType reload_type) {
   if (reload_type != NavigationController::NO_RELOAD &&
       !profile_->IsOffTheRecord()) {
+    bypass_cache_page_url_ = url;
+
     FaviconService* favicon_service = FaviconServiceFactory::GetForProfile(
         profile_, ServiceAccessType::IMPLICIT_ACCESS);
     if (favicon_service) {
       favicon_service->SetFaviconOutOfDateForPage(url);
       if (reload_type == NavigationController::RELOAD_IGNORING_CACHE)
         favicon_service->ClearUnableToDownloadFavicons();
     }
   }
 }
 
 void FaviconTabHelper::DidNavigateMainFrame(
     const content::LoadCommittedDetails& details,
     const content::FrameNavigateParams& params) {
   favicon_urls_.clear();
+
+  // Wait till the user navigates to a new URL to start checking the cache
+  // again. The cache may be ignored for non-reload navigations (e.g.
+  // history.replace() in-page navigation). This is allowed to increase the
+  // likelihood that "reloading a page ignoring the cache" redownloads the
+  // favicon. In particular, a page may do an in-page navigation before
+  // FaviconHandler has the time to determine that the favicon needs to be
+  // redownloaded.
+  GURL url = details.entry->GetURL();
+  if (url != bypass_cache_page_url_)
+    bypass_cache_page_url_ = GURL();
+
   // Get the favicon, either from history or request it from the net.
-  FetchFavicon(details.entry->GetURL());
+  FetchFavicon(url);
 }
 
 // Returns favicon_base::IconType the given icon_type corresponds to.
 // TODO(jif): Move function to /components/favicon_base/content/
 // crbug.com/374281.
 favicon_base::IconType ToChromeIconType(
     content::FaviconURL::IconType icon_type) {
   switch (icon_type) {
     case content::FaviconURL::FAVICON:
       return favicon_base::FAVICON;
@@ skipping 40 matching lines @@
       favicon_service->UnableToDownloadFavicon(image_url);
   }
 
   favicon_handler_->OnDidDownloadFavicon(
       id, image_url, bitmaps, original_bitmap_sizes);
   if (touch_icon_handler_.get()) {
     touch_icon_handler_->OnDidDownloadFavicon(
         id, image_url, bitmaps, original_bitmap_sizes);
   }
 }