[Lock screen media controls] Hide when created in suspended state

Hide the controls when the lock screen is created as a result of
closing lid and in suspend state already.

Bug: 1097101
Change-Id: Ifb1f92bc054c7278992d95c13d5f5e5d750c94c0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2254468
Commit-Queue: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Roman Sorokin [CET] <rsorokin@chromium.org>
Auto-Submit: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#780425}

ash/login/ui/lock_screen_media_controls_view.cc

@@ -16,6 +16,7 @@
 #include "ash/style/ash_color_provider.h"
 #include "base/metrics/histogram_functions.h"
 #include "base/power_monitor/power_monitor.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "components/media_message_center/media_controls_progress_view.h"
 #include "components/media_message_center/media_notification_util.h"
 #include "components/vector_icons/vector_icons.h"
@@ -213,8 +214,15 @@ LockScreenMediaControlsView::LockScreenMediaControlsView(
   DCHECK(callbacks.hide_media_controls);
   DCHECK(callbacks.show_media_controls);
 
-  // Media controls should observer power events.
+  // Media controls should observe power events and handle the case of being
+  // created in suspended state.
   base::PowerMonitor::AddObserver(this);
+  if (base::PowerMonitor::IsProcessSuspended()) {
+    // Post OnSuspend call to run after LockContentsView is initialized.
+    base::ThreadTaskRunnerHandle::Get()->PostTask(
+        FROM_HERE, base::BindOnce(&LockScreenMediaControlsView::OnSuspend,
+                                  weak_ptr_factory_.GetWeakPtr()));
+  }
 
   // Media controls have not been dismissed initially.
   Shell::Get()->media_controller()->SetMediaControlsDismissed(false);

ash/login/ui/lock_screen_media_controls_view.h

@@ -7,6 +7,7 @@
 
 #include "ash/ash_export.h"
 #include "base/containers/flat_set.h"
+#include "base/memory/weak_ptr.h"
 #include "base/power_monitor/power_observer.h"
 #include "base/timer/timer.h"
 #include "mojo/public/cpp/bindings/receiver.h"
@@ -268,6 +269,8 @@ class ASH_EXPORT LockScreenMediaControlsView
   // True if the user is in the process of gesture-dragging |contents_view_|.
   bool is_in_drag_ = false;
 
+  base::WeakPtrFactory<LockScreenMediaControlsView> weak_ptr_factory_{this};
+
   DISALLOW_COPY_AND_ASSIGN(LockScreenMediaControlsView);
 };