Add BlimpView to a Chrome tab when Blimp is enabled.

blimp/client/core/contents/blimp_contents_impl.cc

Index: blimp/client/core/contents/blimp_contents_impl.cc
diff --git a/blimp/client/core/contents/blimp_contents_impl.cc b/blimp/client/core/contents/blimp_contents_impl.cc
index e47adbef146d0a0ef80a3dc72260d08bb3922e39..81341f91565a8e31a65d1fea0669595939d7f6dd 100644
--- a/blimp/client/core/contents/blimp_contents_impl.cc
+++ b/blimp/client/core/contents/blimp_contents_impl.cc
@@ -8,6 +8,7 @@
 #include "base/supports_user_data.h"
 #include "blimp/client/core/contents/tab_control_feature.h"
 #include "blimp/client/public/contents/blimp_contents_observer.h"
+#include "ui/gfx/native_widget_types.h"
 
 #if defined(OS_ANDROID)
 #include "blimp/client/core/contents/android/blimp_contents_impl_android.h"
@@ -24,11 +25,13 @@ const char kBlimpContentsImplAndroidKey[] = "blimp_contents_impl_android";
 }
 
 BlimpContentsImpl::BlimpContentsImpl(int id,
+                                     gfx::NativeWindow window,
                                      ImeFeature* ime_feature,
                                      NavigationFeature* navigation_feature,
                                      TabControlFeature* tab_control_feature)
     : navigation_controller_(this, navigation_feature),
       id_(id),
+      window_(window),
       tab_control_feature_(tab_control_feature) {}
 
 BlimpContentsImpl::~BlimpContentsImpl() {
@@ -58,6 +61,10 @@ BlimpNavigationControllerImpl& BlimpContentsImpl::GetNavigationController() {
   return navigation_controller_;
 }
 
+gfx::NativeWindow BlimpContentsImpl::GetNativeWindow() {
+  return window_;
+}
+
 void BlimpContentsImpl::AddObserver(BlimpContentsObserver* observer) {
   observers_.AddObserver(observer);
 }