heap mojo: add mode to color chooser receiver_

The new wrapper changed the behavior slightly during the migration. The
wrapper defines a default ContextDestroyed method. If some other cleanup
method tries to access the receiver_ it may crash. This change reverts
to the pre-migration behavior.

BUG=chromium:1049056

Change-Id: Id6e5d9fd7405b490afe13764f340dbcccc5e3210
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2131797Reviewed-by: Kouhei Ueno <kouhei@chromium.org>
Commit-Queue: Johann Koenig <johannkoenig@google.com>
Cr-Commit-Position: refs/heads/master@{#755316}

third_party/blink/renderer/core/html/forms/color_chooser_ui_controller.h

@@ -33,6 +33,7 @@
 #include "third_party/blink/renderer/core/html/forms/color_chooser.h"
 #include "third_party/blink/renderer/platform/heap/handle.h"
 #include "third_party/blink/renderer/platform/mojo/heap_mojo_receiver.h"
+#include "third_party/blink/renderer/platform/mojo/heap_mojo_wrapper_mode.h"
 #include "third_party/blink/renderer/platform/text/platform_locale.h"
 
 namespace blink {
@@ -72,7 +73,9 @@ class CORE_EXPORT ColorChooserUIController
 
  private:
   mojo::Remote<mojom::blink::ColorChooserFactory> color_chooser_factory_;
-  HeapMojoReceiver<mojom::blink::ColorChooserClient> receiver_;
+  HeapMojoReceiver<mojom::blink::ColorChooserClient,
+                   HeapMojoWrapperMode::kWithoutContextObserver>
+      receiver_;
 };
 
 }  // namespace blink