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

chrome/browser/ui/cocoa/download/download_shelf_controller.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_shelf_controller.h"
 
 #include "base/mac/mac_util.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/themes/theme_service.h"
@@ skipping 335 matching lines @@
 - (void)closed {
   NSUInteger i = 0;
   while (i < [downloadItemControllers_ count]) {
     DownloadItemController* itemController =
         [downloadItemControllers_ objectAtIndex:i];
     DownloadItem* download = [itemController download];
     bool isTransferDone = download->IsComplete() ||
                           download->IsCancelled() ||
                           download->IsInterrupted();
     if (isTransferDone &&
-        download->safety_state() != DownloadItem::DANGEROUS) {
+        download->GetSafetyState() != DownloadItem::DANGEROUS) {
       [self remove:itemController];
     } else {
       // Treat the item as opened when we close. This way if we get shown again
       // the user need not open this item for the shelf to auto-close.
-      download->set_opened(true);
+      download->SetOpened(true);
       ++i;
     }
   }
 }
 
 - (void)mouseEntered:(NSEvent*)event {
   // If the mouse re-enters the download shelf, cancel the auto-close.  Further
   // mouse exits should not trigger autoclose, so also remove the tracking area.
   [self cancelAutoCloseAndRemoveTrackingArea];
 }
 
 - (void)mouseExited:(NSEvent*)event {
   // Cancel any previous hide requests, just to be safe.
   [NSObject cancelPreviousPerformRequestsWithTarget:self
                                            selector:@selector(hide:)
                                              object:self];
 
   // Schedule an autoclose after a delay.  If the mouse is moved back into the
   // view, or if an item is added to the shelf, the timer will be canceled.
   [self performSelector:@selector(hide:)
              withObject:self
              afterDelay:kAutoCloseDelaySeconds];
 }
 
 - (BOOL)canAutoClose {
   for (NSUInteger i = 0; i < [downloadItemControllers_ count]; ++i) {
     DownloadItemController* itemController =
         [downloadItemControllers_ objectAtIndex:i];
-    if (![itemController download]->opened())
+    if (![itemController download]->GetOpened())
       return NO;
   }
   return YES;
 }
 
 - (void)installTrackingArea {
   // Install the tracking area to listen for mouseExited messages and trigger
   // the shelf autoclose.
   if (trackingArea_.get())
     return;
@@ skipping 48 matching lines @@
   }
 
   // Set the tracking off to create a new tracking area for the control.
   // When changing the bounds/frame on a HoverButton, the tracking isn't updated
   // correctly, it needs to be turned off and back on.
   [hoverCloseButton_ setTrackingEnabled:NO];
   [hoverCloseButton_ setFrame:bounds];
   [hoverCloseButton_ setTrackingEnabled:YES];
 }
 @end