Detect removed files and reflect the state in chrome://downloads and the download shelf

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.h"
 #include "chrome/browser/download/download_item_model.h"
 #include "chrome/browser/download/download_manager.h"
@@ skipping 69 matching lines @@
 @interface DownloadItemCellAnimation : NSAnimation {
   DownloadItemCell* cell_;
 }
 - (id)initWithDownloadItemCell:(DownloadItemCell*)cell
                       duration:(NSTimeInterval)duration
                 animationCurve:(NSAnimationCurve)animationCurve;
 @end
 
 @interface DownloadItemCell(Private)
 - (void)updateTrackingAreas:(id)sender;
+- (void)showSecondaryTitle;
 - (void)hideSecondaryTitle;
 - (void)animation:(NSAnimation*)animation
        progressed:(NSAnimationProgress)progress;
 - (NSString*)elideTitle:(int)availableWidth;
 - (NSString*)elideStatus:(int)availableWidth;
 - (ui::ThemeProvider*)backgroundThemeWrappingProvider:
     (ui::ThemeProvider*)provider;
 - (BOOL)pressedWithDefaultThemeOnPart:(DownloadItemMousePosition)part;
 - (NSColor*)titleColorForPart:(DownloadItemMousePosition)part;
 - (void)drawSecondaryTitleInRect:(NSRect)innerFrame;
@@ skipping 63 matching lines @@
 
   string16 statusText = downloadModel->GetStatusText();
   if (statusText.empty()) {
     // Remove the status text label.
     [self hideSecondaryTitle];
     isStatusTextVisible_ = NO;
   } else {
     // Set status text.
     NSString* statusString = base::SysUTF16ToNSString(statusText);
     [self setSecondaryTitle:statusString];
+    [self showSecondaryTitle];
     isStatusTextVisible_ = YES;
   }
 
   switch (downloadModel->download()->state()) {
     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())
@@ skipping 403 matching lines @@
   [triangle fill];
 }
 
 - (NSRect)imageRectForBounds:(NSRect)cellFrame {
   return NSMakeRect(cellFrame.origin.x + kImagePaddingLeft,
                     cellFrame.origin.y + kImagePaddingTop,
                     kImageWidth,
                     kImageHeight);
 }
 
+- (void)showSecondaryTitle {
+  [self animation:nil progressed:0.0];
+}
+
 - (void)hideSecondaryTitle {
   if (isStatusTextVisible_) {
     // No core animation -- text in CA layers is not subpixel antialiased :-/
     hideStatusAnimation_.reset([[DownloadItemCellAnimation alloc]
         initWithDownloadItemCell:self
                         duration:kHideStatusDuration
                   animationCurve:NSAnimationEaseIn]);
     [hideStatusAnimation_.get() setDelegate:self];
     [hideStatusAnimation_.get() startAnimation];
   } else {
@@ skipping 37 matching lines @@
   }
   return self;
 }
 
 - (void)setCurrentProgress:(NSAnimationProgress)progress {
   [super setCurrentProgress:progress];
   [cell_ animation:self progressed:progress];
 }
 
 @end