Convert ContentFaviconDriver to use the new navigation callbacks.

content/public/browser/navigation_handle.h

Index: content/public/browser/navigation_handle.h
diff --git a/content/public/browser/navigation_handle.h b/content/public/browser/navigation_handle.h
index 96dddc5624480a94045937de247eedbc4eea8a5d..756053424432b63f9208ca40fc37b624bfee8f2c 100644
--- a/content/public/browser/navigation_handle.h
+++ b/content/public/browser/navigation_handle.h
@@ -10,6 +10,7 @@
 
 #include "content/common/content_export.h"
 #include "content/public/browser/navigation_throttle.h"
+#include "content/public/browser/reload_type.h"
 #include "content/public/common/referrer.h"
 #include "net/base/net_errors.h"
 #include "net/http/http_response_info.h"
@@ -98,6 +99,8 @@ class CONTENT_EXPORT NavigationHandle {
   virtual const GURL& GetSearchableFormURL() = 0;
   virtual const std::string& GetSearchableFormEncoding() = 0;
 
+  virtual ReloadType GetReloadType() = 0;

[Charlie Reis, 2017/01/23 18:30:08]

Let's add a comment mentioning this is only present for browser-initiated
navigations (e.g., not location.reload()) if we keep this.

+
   // Parameters available at network request start time ------------------------
   //
   // The following parameters are only available when the network request is