Don't animate the download shelf when entering/exiting fullscreen.

chrome/browser/ui/cocoa/download/download_shelf_mac.mm

Index: chrome/browser/ui/cocoa/download/download_shelf_mac.mm
diff --git a/chrome/browser/ui/cocoa/download/download_shelf_mac.mm b/chrome/browser/ui/cocoa/download/download_shelf_mac.mm
index cf14be75ecc54bfa5be085e97b5d463db7ef8b0f..35ca1d36cb4ca5fe5b916b5e1b64df62ebe276b6 100644
--- a/chrome/browser/ui/cocoa/download/download_shelf_mac.mm
+++ b/chrome/browser/ui/cocoa/download/download_shelf_mac.mm
@@ -28,18 +28,28 @@ bool DownloadShelfMac::IsClosing() const {
   return false;
 }
 
-void DownloadShelfMac::DoShow() {
-  [shelf_controller_ showDownloadShelf:YES
-                          isUserAction:NO];
+void DownloadShelfMac::DoOpen() {
+  [shelf_controller_ showDownloadShelf:YES isUserAction:NO animate:YES];
   browser_->UpdateDownloadShelfVisibility(true);
 }
 
 void DownloadShelfMac::DoClose(CloseReason reason) {
   [shelf_controller_ showDownloadShelf:NO
-                          isUserAction:reason == USER_ACTION];
+                          isUserAction:reason == USER_ACTION
+                               animate:YES];
   browser_->UpdateDownloadShelfVisibility(false);
 }
 
+void DownloadShelfMac::DoHide() {
+  [shelf_controller_ showDownloadShelf:NO isUserAction:NO animate:NO];
+  browser_->UpdateDownloadShelfVisibility(false);
+}
+
+void DownloadShelfMac::DoUnhide() {
+  [shelf_controller_ showDownloadShelf:YES isUserAction:NO animate:NO];
+  browser_->UpdateDownloadShelfVisibility(true);
+}
+
 Browser* DownloadShelfMac::browser() const {
   return browser_;
 }