Add BlimpView to a Chrome tab when Blimp is enabled.

blimp/client/core/blimp_client_context_impl.cc

Index: blimp/client/core/blimp_client_context_impl.cc
diff --git a/blimp/client/core/blimp_client_context_impl.cc b/blimp/client/core/blimp_client_context_impl.cc
index 4ebebde648c30cfb8a3c03536604343eb4b982d8..6bdf85eaffe0a0639d4af0f8ad15fa3ff6d3d637 100644
--- a/blimp/client/core/blimp_client_context_impl.cc
+++ b/blimp/client/core/blimp_client_context_impl.cc
@@ -15,6 +15,7 @@
 #include "blimp/client/core/contents/tab_control_feature.h"
 #include "blimp/client/core/session/cross_thread_network_event_observer.h"
 #include "blimp/client/public/blimp_client_context_delegate.h"
+#include "ui/gfx/native_widget_types.h"
 
 #if defined(OS_ANDROID)
 #include "blimp/client/core/android/blimp_client_context_impl_android.h"
@@ -85,9 +86,10 @@ void BlimpClientContextImpl::SetDelegate(BlimpClientContextDelegate* delegate) {
   delegate_ = delegate;
 }
 
-std::unique_ptr<BlimpContents> BlimpClientContextImpl::CreateBlimpContents() {
+std::unique_ptr<BlimpContents> BlimpClientContextImpl::CreateBlimpContents(
+    gfx::NativeWindow window) {
   std::unique_ptr<BlimpContents> blimp_contents =
-      blimp_contents_manager_->CreateBlimpContents();
+      blimp_contents_manager_->CreateBlimpContents(window);
   delegate_->AttachBlimpContentsHelpers(blimp_contents.get());
   return blimp_contents;
 }