Split DownloadItem into an ABC, an Impl, and a Mock.

chrome/browser/ui/cocoa/download/download_item_cell.mm

 // Copyright (c) 2011 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.
 
 #import "chrome/browser/ui/cocoa/download/download_item_cell.h"
 
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/download/download_item_model.h"
 #include "chrome/browser/download/download_util.h"
 #import "chrome/browser/themes/theme_service.h"
@@ skipping 157 matching lines @@
   if (statusText.empty()) {
     // Remove the status text label.
     [self hideSecondaryTitle];
   } else {
     // Set status text.
     NSString* statusString = base::SysUTF16ToNSString(statusText);
     [self setSecondaryTitle:statusString];
     [self showSecondaryTitle];
   }
 
-  switch (downloadModel->download()->state()) {
+  switch (downloadModel->download()->GetState()) {
     case DownloadItem::COMPLETE:
       // Small downloads may start in a complete state due to asynchronous
       // notifications. In this case, we'll get a second complete notification
       // via the observers, so we ignore it and avoid creating a second complete
       // animation.
       if (completionAnimation_.get())
         break;
       completionAnimation_.reset([[DownloadItemCellAnimation alloc]
           initWithDownloadItemCell:self
                           duration:kCompleteAnimationDuration
@@ skipping 14 matching lines @@
         break;
       completionAnimation_.reset([[DownloadItemCellAnimation alloc]
           initWithDownloadItemCell:self
                           duration:kInterruptedAnimationDuration
                     animationCurve:NSAnimationLinear]);
       [completionAnimation_.get() setDelegate:self];
       [completionAnimation_.get() startAnimation];
       percentDone_ = -2;
       break;
     case DownloadItem::IN_PROGRESS:
-      percentDone_ = downloadModel->download()->is_paused() ?
+      percentDone_ = downloadModel->download()->IsPaused() ?
           -1 : downloadModel->download()->PercentComplete();
       break;
     default:
       NOTREACHED();
   }
 
   [[self controlView] setNeedsDisplay:YES];
 }
 
 - (void)updateTrackingAreas:(id)sender {
@@ skipping 460 matching lines @@
   }
   return self;
 }
 
 - (void)setCurrentProgress:(NSAnimationProgress)progress {
   [super setCurrentProgress:progress];
   [cell_ animation:self progressed:progress];
 }
 
 @end