[CrOS PhoneHub] Adjust bubble size when browser tabs changed in task

continuation.

When browser tabs changed and the bubble is not closed, the bubble's
size need to be re-adjusted in TaskContinuationView and
PhoneConnectedView.

BUG=1106937,1126208

Change-Id: I110b8cd25ce45764b0072f99c6ec32e1bf00444f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2438753Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Tim Song <tengs@chromium.org>
Commit-Queue: Andre Le <leandre@chromium.org>
Cr-Commit-Position: refs/heads/master@{#812206}

ash/system/phonehub/phone_connected_view.cc

@@ -62,6 +62,16 @@ PhoneConnectedView::PhoneConnectedView(
 
 PhoneConnectedView::~PhoneConnectedView() = default;
 
+void PhoneConnectedView::ChildPreferredSizeChanged(View* child) {
+  // Resize the bubble when the child change its size.
+  PreferredSizeChanged();
+}
+
+void PhoneConnectedView::ChildVisibilityChanged(View* child) {
+  // Resize the bubble when the child change its visibility.
+  PreferredSizeChanged();
+}
+
 const char* PhoneConnectedView::GetClassName() const {
   return "PhoneConnectedView";
 }

ash/system/phonehub/phone_connected_view.h

@@ -27,6 +27,8 @@ class PhoneConnectedView : public views::View {
   ~PhoneConnectedView() override;
 
   // views::View:
+  void ChildPreferredSizeChanged(View* child) override;
+  void ChildVisibilityChanged(View* child) override;
   const char* GetClassName() const override;
 
  private:

ash/system/phonehub/task_continuation_view.cc

@@ -142,6 +142,8 @@ void TaskContinuationView::TaskChipsView::CalculateIdealBounds() {
 }
 
 void TaskContinuationView::Update() {
+  chips_view_->Reset();
+
   if (!phone_model_->browser_tabs_model()) {
     SetVisible(false);
     return;
@@ -156,12 +158,12 @@ void TaskContinuationView::Update() {
     return;
   }
 
-  chips_view_->Reset();
   for (const BrowserTabsModel::BrowserTabMetadata& metadata :
        browser_tabs.most_recent_tabs()) {
     chips_view_->AddTaskChip(new ContinueBrowsingChip(metadata));
   }
 
+  PreferredSizeChanged();
   SetVisible(true);
 }