[IntentHandling] Show intent picker icon before loading the bubble.

Currently when we try to automatically show bubble for intent picker, we
will wait until the content of the bubble loaded before showing the
intent picker icon. This CL updates the code to show the icon
immediately when we find out there is app in the picker.

BUG=853604

Change-Id: I32ed2b3e1368c2d6ff8f7032ffbea3fa820c5cf5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2643424
Commit-Queue: Maggie Cai <mxcai@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#846007}

chrome/browser/chromeos/apps/intent_helper/chromeos_intent_picker_helpers.cc

@@ -237,13 +237,14 @@ void MaybeShowIntentPickerChromeOs(
     return;
   }
 
+  IntentPickerTabHelper::SetShouldShowIcon(web_contents, true);
+
   IntentPickerAutoDisplayService* ui_auto_display_service =
       IntentPickerAutoDisplayService::Get(
           Profile::FromBrowserContext(web_contents->GetBrowserContext()));
 
   if (GetPickerShowState(navigation_handle, apps) ==
       PickerShowState::kOmnibox) {
-    IntentPickerTabHelper::SetShouldShowIcon(web_contents, true);
     return;
   }