cros: Move OnClipboardHistoryPasted closer to paste

Before it was not getting hit on all code paths.

Bug: 1148396
Change-Id: I95c3d4a2a63f167dfc3d7bb94fc3dbc4af0bd132
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2535214Reviewed-by: Andrew Xu <andrewxu@chromium.org>
Commit-Queue: Alex Newcomer <newcomer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#826900}

ash/clipboard/clipboard_history_controller_impl.cc

@@ -280,9 +280,6 @@ void ClipboardHistoryControllerImpl::ExecuteSelectedMenuItem(int event_flags) {
   // If no menu item is currently selected, we'll fallback to the first item.
   menu_delegate_->ExecuteCommand(
       command.value_or(ClipboardHistoryUtil::kFirstItemCommandId), event_flags);
-
-  for (auto& observer : observers_)
-    observer.OnClipboardHistoryPasted();
 }
 
 void ClipboardHistoryControllerImpl::ExecuteCommand(int command_id,
@@ -340,6 +337,9 @@ void ClipboardHistoryControllerImpl::PasteMenuItemData(int command_id,
 
   SendSyntheticKeyEvent(ui::VKEY_V, ui::EF_CONTROL_DOWN);
 
+  for (auto& observer : observers_)
+    observer.OnClipboardHistoryPasted();
+
   if (!original_data)
     return;