Introduce structures to reduce the number of arguments in the FaviconService methods.

chrome/browser/favicon/favicon_handler.cc

Index: chrome/browser/favicon/favicon_handler.cc
diff --git a/chrome/browser/favicon/favicon_handler.cc b/chrome/browser/favicon/favicon_handler.cc
index dc2b228c6a2189fb0fd89b93557259225c6b21b1..55562919b496f94dbd059681aa25d2b72271ce92 100644
--- a/chrome/browser/favicon/favicon_handler.cc
+++ b/chrome/browser/favicon/favicon_handler.cc
@@ -379,8 +379,10 @@ void FaviconHandler::GetFavicon(
     history::IconType icon_type,
     CancelableRequestConsumerBase* consumer,
     const FaviconService::FaviconResultsCallback& callback) {
-  GetFaviconService()->GetFavicon(icon_url, icon_type, preferred_icon_size(),
-      ui::GetSupportedScaleFactors(), consumer, callback);
+  GetFaviconService()->GetFavicon(
+      FaviconService::FaviconParams(icon_url, icon_type,
+                                    preferred_icon_size(), consumer),
+      ui::GetSupportedScaleFactors(), callback);
 }
 
 void FaviconHandler::GetFaviconForURL(
@@ -388,9 +390,10 @@ void FaviconHandler::GetFaviconForURL(
     int icon_types,
     CancelableRequestConsumerBase* consumer,
     const FaviconService::FaviconResultsCallback& callback) {
-  GetFaviconService()->GetFaviconForURL(profile_, page_url, icon_types,
-      preferred_icon_size(), ui::GetSupportedScaleFactors(), consumer,
-      callback);
+  GetFaviconService()->GetFaviconForURL(
+      FaviconService::FaviconForURLParams(profile_, page_url, icon_types,
+                                          preferred_icon_size(), consumer),
+      ui::GetSupportedScaleFactors(), callback);
 }
 
 void FaviconHandler::SetHistoryFavicon(