Make pull to refresh not perform regular reload (with cache revalidation)

content/public/browser/navigation_controller.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_NAVIGATION_CONTROLLER_H_
 #define CONTENT_PUBLIC_BROWSER_NAVIGATION_CONTROLLER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 337 matching lines @@
   virtual void GoToIndex(int index) = 0;
 
   // Navigates to the specified offset from the "current entry". Does nothing if
   // the offset is out of bounds.
   virtual void GoToOffset(int offset) = 0;
 
   // Reloads the current entry. If |check_for_repost| is true and the current
   // entry has POST data the user is prompted to see if they really want to
   // reload the page. In nearly all cases pass in true.  If a transient entry
   // is showing, initiates a new navigation to its URL.
   virtual void Reload(bool check_for_repost) = 0;

[newt (away), 2015/12/15 22:40:21]

Random side question: why not have a single Reload() method that takes a
ReloadType as a parameter? Seems like that would reduce proliferation of
ReloadXyz() methods everywhere.

[kinuko, 2015/12/15 22:54:38]

That's what ReloadInternal does.  I can kinda imagine that we didn't want to
sprinkle the various loading enums or we probably didn't have too many when we
started adding these.  Maybe we can revisit cleaning up this

 
+  // Like Reload(), but for refreshing page content and may not need to
+  // validate cache content.
+  // TODO(kinuko): Update the comment once we fix the cache validation
+  // behavior.
+  virtual void ReloadToRefreshContent(bool check_for_repost) = 0;
+
   // Like Reload(), but don't use caches (aka "shift-reload").
   virtual void ReloadIgnoringCache(bool check_for_repost) = 0;
 
   // Reloads the current entry using the original URL used to create it.  This
   // is used for cases where the user wants to refresh a page using a different
   // user agent after following a redirect.
   virtual void ReloadOriginalRequestURL(bool check_for_repost) = 0;
 
   // Like Reload(), but disables Lo-Fi.
   virtual void ReloadDisableLoFi(bool check_for_repost) = 0;
@@ skipping 105 matching lines @@
 
  private:
   // This interface should only be implemented inside content.
   friend class NavigationControllerImpl;
   NavigationController() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_NAVIGATION_CONTROLLER_H_