Fix using theme colors for the download shelf's close button.

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

Index: chrome/browser/ui/cocoa/download/download_shelf_view_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/download/download_shelf_view_cocoa.mm b/chrome/browser/ui/cocoa/download/download_shelf_view_cocoa.mm
index c74832b77a6e9579ddbff216bdaa035c71610725..5e7c9774dd0fc509178d4b74acb5df9e68dc3088 100644
--- a/chrome/browser/ui/cocoa/download/download_shelf_view_cocoa.mm
+++ b/chrome/browser/ui/cocoa/download/download_shelf_view_cocoa.mm
@@ -6,6 +6,7 @@
 
 #include "chrome/browser/themes/theme_properties.h"
 #include "chrome/browser/themes/theme_service.h"
+#include "chrome/browser/ui/cocoa/hover_close_button.h"
 #import "chrome/browser/ui/cocoa/tabs/tab_strip_controller.h"
 #import "chrome/browser/ui/cocoa/view_id_util.h"
 #import "ui/base/cocoa/nsview_additions.h"
@@ -61,6 +62,14 @@
   }
 }
 
+- (void)viewWillDraw {
+  if (const ui::ThemeProvider* themeProvider = [[self window] themeProvider]) {
+    [closeButton_
+        setIconColor:themeProvider->GetColor(ThemeProperties::COLOR_TAB_TEXT)];
+  }
+  [super viewWillDraw];
+}
+
 // Mouse down events on the download shelf should not allow dragging the parent
 // window around.
 - (BOOL)mouseDownCanMoveWindow {