Fix the URL status bubble overlapping the Mac download shelf

chrome/browser/cocoa/download_shelf_controller.h

Index: chrome/browser/cocoa/download_shelf_controller.h
===================================================================
--- chrome/browser/cocoa/download_shelf_controller.h	(revision 21184)
+++ chrome/browser/cocoa/download_shelf_controller.h	(working copy)
@@ -28,7 +28,7 @@
 
   scoped_ptr<DownloadShelf> bridge_;
   NSView* contentArea_;
-  int shelfHeight_;
+  float shelfHeight_;
 
   // The download items we have added to our shelf.
   scoped_nsobject<NSMutableArray> downloadItemControllers_;
@@ -40,6 +40,8 @@
 - (BOOL)isVisible;
 
 - (IBAction)show:(id)sender;
+
+// Run when the user clicks the close button on the right side of the shelf.
 - (IBAction)hide:(id)sender;
 
 - (void)addDownloadItem:(BaseDownloadItemModel*)model;
@@ -53,4 +55,7 @@
 // Notification that we are closing and should release our downloads.
 - (void)exiting;
 
+// Return the height of the download shelf.
+- (float)height;
+
 @end