[Mac] DownloadShelf should be notified when autoclosing.

chrome/browser/ui/cocoa/download/download_shelf_controller.h

Index: chrome/browser/ui/cocoa/download/download_shelf_controller.h
diff --git a/chrome/browser/ui/cocoa/download/download_shelf_controller.h b/chrome/browser/ui/cocoa/download/download_shelf_controller.h
index 91f5a655e6c43aea79e17bb0d2241d69ba7bf2e6..159aff3f9c654f29423a8b4c89ef77b829d84f0d 100644
--- a/chrome/browser/ui/cocoa/download/download_shelf_controller.h
+++ b/chrome/browser/ui/cocoa/download/download_shelf_controller.h
@@ -77,19 +77,26 @@ class PageNavigator;
 - (id)initWithBrowser:(Browser*)browser
        resizeDelegate:(id<ViewResizer>)resizeDelegate;
 
+// Run when the user clicks the 'Show All' button.
 - (IBAction)showDownloadsTab:(id)sender;
 
-// Returns our view cast as an AnimatableView.
-- (AnimatableView*)animatableView;
-
-- (DownloadShelf*)bridge;
-- (BOOL)isVisible;
+// Run when the user clicks the close button on the right side of the shelf.
+- (IBAction)handleClose:(id)sender;
 
-- (IBAction)show:(id)sender;
+// Shows or hides the download shelf based on the value of |show|.
+// |isUserAction| should be YES if the operation is being triggered based on a
+// user action (currently only relevant when hiding the shelf).
+// Note: This is intended to be invoked from DownloadShelfMac. If invoked
+// directly, the shelf visibility state maintained by DownloadShelf and the
+// owning Browser will not be updated.
+- (void)showDownloadShelf:(BOOL)show
+             isUserAction:(BOOL)isUserAction;
 
-// Run when the user clicks the close button on the right side of the shelf.
-- (IBAction)hide:(id)sender;
+// Re-layouts all download items based on their current state.
+- (void)layoutItems;
 
+// Add a new download item to the leftmost position of the download shelf. The
+// item should not have been already added to this shelf.
 - (void)addDownloadItem:(content::DownloadItem*)downloadItem;
 
 // Remove a download, possibly via clearing browser data.
@@ -101,10 +108,14 @@ class PageNavigator;
 // Notification that we are closing and should release our downloads.
 - (void)exiting;
 
+// Returns our view cast as an AnimatableView.
+- (AnimatableView*)animatableView;
+
+- (DownloadShelf*)bridge;
+
+- (BOOL)isVisible;
+
 // Return the height of the download shelf.
 - (float)height;
 
-// Re-layouts all download items based on their current state.
-- (void)layoutItems;
-
 @end