move favicon download code from chrome/ into content/

chrome/browser/favicon/favicon_tab_helper.cc

Index: chrome/browser/favicon/favicon_tab_helper.cc
diff --git a/chrome/browser/favicon/favicon_tab_helper.cc b/chrome/browser/favicon/favicon_tab_helper.cc
index 912c6369a5a914a6481ad2aa858a74604ec16ffe..939b049e5653d34e2dc86a4624a25fb241bc2153 100644
--- a/chrome/browser/favicon/favicon_tab_helper.cc
+++ b/chrome/browser/favicon/favicon_tab_helper.cc
@@ -4,7 +4,6 @@
 
 #include "chrome/browser/favicon/favicon_tab_helper.h"
 
-#include "chrome/browser/favicon/favicon_download_helper.h"
 #include "chrome/browser/favicon/favicon_handler.h"
 #include "chrome/browser/favicon/favicon_service_factory.h"
 #include "chrome/browser/favicon/favicon_util.h"
@@ -13,7 +12,6 @@
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_notification_types.h"
-#include "chrome/common/icon_messages.h"
 #include "content/public/browser/favicon_status.h"
 #include "content/public/browser/invalidate_type.h"
 #include "content/public/browser/navigation_controller.h"
@@ -30,6 +28,7 @@
 #include "ui/gfx/image/image_skia_rep.h"
 
 using content::FaviconStatus;
+using content::FaviconURL;
 using content::NavigationController;
 using content::NavigationEntry;
 using content::WebContents;
@@ -39,7 +38,7 @@ DEFINE_WEB_CONTENTS_USER_DATA_KEY(FaviconTabHelper)
 FaviconTabHelper::FaviconTabHelper(WebContents* web_contents)
     : content::WebContentsObserver(web_contents),
       profile_(Profile::FromBrowserContext(web_contents->GetBrowserContext())) {
-  favicon_download_helper_.reset(new FaviconDownloadHelper(web_contents, this));
+  web_contents->RegisterFaviconDelegate(this);
   favicon_handler_.reset(new FaviconHandler(profile_, this,
                                             FaviconHandler::FAVICON));
   if (chrome::kEnableTouchIcon)
@@ -95,7 +94,7 @@ bool FaviconTabHelper::ShouldDisplayFavicon() {
   return true;
 }
 
-void FaviconTabHelper::OnUpdateFaviconURL(
+void FaviconTabHelper::UpdateFaviconURL(
     int32 page_id,
     const std::vector<FaviconURL>& candidates) {
   favicon_handler_->OnUpdateFaviconURL(page_id, candidates);
@@ -134,7 +133,7 @@ NavigationEntry* FaviconTabHelper::GetActiveEntry() {
 }
 
 int FaviconTabHelper::StartDownload(const GURL& url, int image_size) {
-  return favicon_download_helper_->DownloadFavicon(url, image_size);
+  return web_contents()->DownloadFavicon(url, image_size);
 }
 
 void FaviconTabHelper::NotifyFaviconUpdated() {
@@ -164,7 +163,7 @@ void FaviconTabHelper::DidNavigateMainFrame(
   FetchFavicon(details.entry->GetURL());
 }
 
-void FaviconTabHelper::OnDidDownloadFavicon(
+void FaviconTabHelper::DidDownloadFavicon(
     int id,
     const GURL& image_url,
     bool errored,