[Chromecast] Temporarily disable blink::features::kMixedContentAutoUpgrade.

Casting content from a local server is broken because the request is
auto upgraded to HTTPS.

Bug: b/153100172
Test: CQ
Change-Id: Ib3cb140df74cbc9336b245069c050163bac120ed
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2135889Reviewed-by: Yuchen Liu <yucliu@chromium.org>
Reviewed-by: Carlos IL <carlosil@chromium.org>
Commit-Queue: Junbo Ke <juke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#756383}

chromecast/browser/BUILD.gn

@@ -210,6 +210,7 @@ cast_source_set("browser") {
     "//services/media_session/public/mojom",
     "//services/network/public/mojom",
     "//services/service_manager/public/cpp",
+    "//third_party/blink/public/common:headers",
     "//ui/base",
     "//ui/compositor",
     "//ui/display",

chromecast/browser/cast_content_browser_client.cc

@@ -84,6 +84,7 @@
 #include "net/url_request/url_request_context_getter.h"
 #include "services/network/public/cpp/network_switches.h"
 #include "services/service_manager/embedder/descriptors.h"
+#include "third_party/blink/public/common/features.h"
 #include "ui/display/display.h"
 #include "ui/display/screen.h"
 #include "ui/gl/gl_switches.h"
@@ -158,12 +159,14 @@ CastContentBrowserClient::CastContentBrowserClient(
 #endif
   });
 
-#if defined(OS_ANDROID)
   cast_feature_list_creator_->SetExtraDisableFeatures({
+      // TODO(juke): Reenable this after solving casting issue on LAN.
+      blink::features::kMixedContentAutoupgrade,
+#if defined(OS_ANDROID)
       ::media::kAudioFocusLossSuspendMediaSession,
       ::media::kRequestSystemAudioFocus,
-  });
 #endif
+  });
 }
 
 CastContentBrowserClient::~CastContentBrowserClient() {