Fix the URL status bubble overlapping the Mac download shelf

chrome/browser/cocoa/download_shelf_controller.mm

Index: chrome/browser/cocoa/download_shelf_controller.mm
===================================================================
--- chrome/browser/cocoa/download_shelf_controller.mm	(revision 21184)
+++ chrome/browser/cocoa/download_shelf_controller.mm	(working copy)
@@ -177,9 +177,19 @@
 }
 
 - (void)hide:(id)sender {
-  [self showDownloadShelf:NO];
+  // If |sender| isn't nil, then we're being closed from the UI by the user and
+  // we need to tell our shelf implementation to close. Otherwise, we're being
+  // closed programmatically by our shelf implementation.
+  if (sender)
+    bridge_->Close();
+  else
+    [self showDownloadShelf:NO];
 }
 
+- (float)height {
+  return shelfHeight_;
+}
+
 - (void)addDownloadItem:(BaseDownloadItemModel*)model {
   // TODO(thakis): we need to delete these at some point. There's no explicit
   // mass delete on windows, figure out where they do it.