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

chrome/android/java/src/org/chromium/chrome/browser/SwipeRefreshHandler.java

 // Copyright 2015 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.
 
 package org.chromium.chrome.browser;
 
 import android.content.Context;
 import android.view.ViewGroup.LayoutParams;
 
 import org.chromium.base.TraceEvent;
@@ skipping 74 matching lines @@
             public void onRefresh() {
                 cancelStopRefreshingRunnable();
                 mSwipeRefreshLayout.postDelayed(
                         getStopRefreshingRunnable(), MAX_REFRESH_ANIMATION_DURATION_MS);
                 if (mAccessibilityRefreshString == null) {
                     int resId = R.string.accessibility_swipe_refresh;
                     mAccessibilityRefreshString =
                             contentViewCore.getContext().getResources().getString(resId);
                 }
                 mSwipeRefreshLayout.announceForAccessibility(mAccessibilityRefreshString);
-                contentViewCore.getWebContents().getNavigationController().reload(true);
+                contentViewCore.getWebContents().getNavigationController().reloadToRefreshContent(

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

Instead of a reload, could we simply load the current URL again? Then we
wouldn't need a special new method. Or is that a terrible idea for some reason?

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

That'd probably work, but I thought we might still want to have logic for
avoiding repost etc.

+                        true);
                 RecordUserAction.record("MobilePullGestureReload");
             }
         });
         contentViewCore.setOverscrollRefreshHandler(this);
     }
 
     /**
      * Notify the SwipeRefreshLayout that a refresh action has completed.
      * Defer the notification by a reasonable minimum to ensure sufficient
      * visiblity of the animation.
@@ skipping 66 matching lines @@
     }
 
     private void detachSwipeRefreshLayoutIfNecessary() {
         // TODO(jdduke): Also detach the effect when its animation ends.
         if (mContentViewCore == null) return;
         if (mSwipeRefreshLayout.getParent() != null) {
             mContentViewCore.getContainerView().removeView(mSwipeRefreshLayout);
         }
     }
 }