Chromecast: disables downloads from the Chromecast shell.

chromecast/shell/browser/cast_browser_context.h

Index: chromecast/shell/browser/cast_browser_context.h
diff --git a/chromecast/shell/browser/cast_browser_context.h b/chromecast/shell/browser/cast_browser_context.h
index 1f124a5d48f1ce48ddd2b8bcf92b11e04a5e213b..527e7e2eaca7ad8026b53426e5b25bf59b132a40 100644
--- a/chromecast/shell/browser/cast_browser_context.h
+++ b/chromecast/shell/browser/cast_browser_context.h
@@ -13,6 +13,7 @@
 namespace chromecast {
 namespace shell {
 
+class CastDownloadManagerDelegate;
 class URLRequestContextFactory;
 
 // Chromecast does not currently support multiple profiles.  So there is a
@@ -55,6 +56,7 @@ class CastBrowserContext : public content::BrowserContext {
   URLRequestContextFactory* const url_request_context_factory_;
   base::FilePath path_;
   scoped_ptr<CastResourceContext> resource_context_;
+  scoped_ptr<CastDownloadManagerDelegate> download_manager_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(CastBrowserContext);
 };