[Sharesheet] Fix scale animation.

Scale animation not always completing. Update layer after setting
transition to fix issue.

Bug: 1152651
Change-Id: I4785b5b5da3f8bff19d9076ce517f16b2001af56
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2557823Reviewed-by: Bret Sepulveda <bsep@chromium.org>
Commit-Queue: Melissa Zhang <melzhang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833037}

chrome/browser/ui/views/sharesheet/sharesheet_bubble_view.cc

@@ -322,19 +322,22 @@ void SharesheetBubbleView::ShowActionView() {
   share_action_scoped_settings->SetPreemptionStrategy(
       ui::LayerAnimator::ENQUEUE_NEW_ANIMATION);
 
-  // |share_action_view_| scale & opacity fade in.
+  // |share_action_view_| scale fade in.
   share_action_scoped_settings->SetTransitionDuration(kSlowAnimateTime);
   share_action_scoped_settings->SetTweenType(gfx::Tween::FAST_OUT_SLOW_IN_2);
+  // Set##name kicks off the animation with the TransitionDuration and
+  // TweenType currently set. See ui/compositor/layer_animator.cc Set##name.
+  share_action_view_layer->SetTransform(gfx::Transform());
+  // |share_action_view_| opacity fade in.
   share_action_scoped_settings->SetTransitionDuration(kQuickAnimateTime);
   share_action_scoped_settings->SetTweenType(gfx::Tween::Type::LINEAR);
+  share_action_view_layer->SetOpacity(1.0f);
 
   // Delay |share_action_view_| animate so that we can see |main_view_| fade out
   // first.
   share_action_view_layer->GetAnimator()->SchedulePauseForProperties(
       kAnimateDelay, ui::LayerAnimationElement::TRANSFORM |
                          ui::LayerAnimationElement::OPACITY);
-  share_action_view_layer->SetOpacity(1.0f);
-  share_action_view_layer->SetTransform(gfx::Transform());
 }
 
 void SharesheetBubbleView::ResizeBubble(const int& width, const int& height) {