Initial download shelf on OS X....

chrome/browser/cocoa/browser_window_controller.h

Index: chrome/browser/cocoa/browser_window_controller.h
===================================================================
--- chrome/browser/cocoa/browser_window_controller.h	(revision 18653)
+++ chrome/browser/cocoa/browser_window_controller.h	(working copy)
@@ -20,6 +20,7 @@
 class Browser;
 class BrowserWindow;
 class BrowserWindowCocoa;
+@class DownloadShelfController;
 @class FindBarCocoaController;
 class LocationBar;
 class StatusBubble;
@@ -50,6 +51,7 @@
   scoped_nsobject<TabStripController> tabStripController_;
   scoped_nsobject<FindBarCocoaController> findBarCocoaController_;
   scoped_ptr<StatusBubble> statusBubble_;
+  scoped_nsobject<DownloadShelfController> downloadShelfController_;
   BOOL ownsBrowser_;  // Only ever NO when testing
 }
 
@@ -97,6 +99,11 @@
 
 - (void)toggleBookmarkBar;
 
+- (BOOL)isDownloadShelfVisible;
+
+// Lazily creates the download shelf in visible state if it doesn't exist yet.
+- (DownloadShelfController*)downloadShelf;
+
 // Retains the given FindBarCocoaController and adds its view to this
 // browser window.  Must only be called once per
 // BrowserWindowController.