Expose loading state from Blimp to Tab

blimp/client/core/contents/blimp_contents_impl.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "blimp/client/core/contents/blimp_contents_impl.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/supports_user_data.h"
 #include "blimp/client/core/contents/blimp_contents_view.h"
 #include "blimp/client/core/contents/tab_control_feature.h"
@@ skipping 87 matching lines @@
 
 bool BlimpContentsImpl::HasObserver(BlimpContentsObserver* observer) {
   return observers_.HasObserver(observer);
 }
 
 void BlimpContentsImpl::OnNavigationStateChanged() {
   FOR_EACH_OBSERVER(BlimpContentsObserver, observers_,
                     OnNavigationStateChanged());
 }
 
+void BlimpContentsImpl::OnLoadingStateChanged(bool loading) {
+  FOR_EACH_OBSERVER(BlimpContentsObserver, observers_,
+                    OnLoadingStateChanged(loading));
+}
+
 void BlimpContentsImpl::SetSizeAndScale(const gfx::Size& size,
                                         float device_pixel_ratio) {
   tab_control_feature_->SetSizeAndScale(size, device_pixel_ratio);
 }
 
 BlimpContentsView* BlimpContentsImpl::GetBlimpContentsView() {
   return blimp_contents_view_.get();
 }
 
 }  // namespace client
 }  // namespace blimp