Retire ScopedObserver in /chrome/browser/ui/views/autofill.

ScopedObserver is being deprecated in favor of two new classes:
- base::ScopedObservation for observers that only ever observe
  a single source.
- base::ScopedMultiSourceObservation for observers that do or may
  observe more than a single source.

This CL was uploaded by git cl split.

R=estade@chromium.org

Bug: 1145565
Change-Id: Icbd9700d976f131d4507a9601d7664894806da2a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2547961
Commit-Queue: Sigurður Ásgeirsson <siggi@chromium.org>
Auto-Submit: Sigurður Ásgeirsson <siggi@chromium.org>
Reviewed-by: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#829253}

chrome/browser/ui/views/autofill/autofill_bubble_handler_impl.cc

@@ -36,13 +36,14 @@ AutofillBubbleHandlerImpl::AutofillBubbleHandlerImpl(
     ToolbarButtonProvider* toolbar_button_provider)
     : browser_(browser), toolbar_button_provider_(toolbar_button_provider) {
   if (browser->profile()) {
-    personal_data_manager_observer_.Add(
+    personal_data_manager_observation_.Observe(
         PersonalDataManagerFactory::GetForProfile(
             browser->profile()->GetOriginalProfile()));
   }
-  if (toolbar_button_provider_->GetAvatarToolbarButton())
-    avatar_toolbar_button_observer_.Add(
+  if (toolbar_button_provider_->GetAvatarToolbarButton()) {
+    avatar_toolbar_button_observation_.Observe(
         toolbar_button_provider_->GetAvatarToolbarButton());
+  }
 }
 
 AutofillBubbleHandlerImpl::~AutofillBubbleHandlerImpl() = default;

chrome/browser/ui/views/autofill/autofill_bubble_handler_impl.h

@@ -6,7 +6,7 @@
 #define CHROME_BROWSER_UI_VIEWS_AUTOFILL_AUTOFILL_BUBBLE_HANDLER_IMPL_H_
 
 #include "base/macros.h"
-#include "base/scoped_observer.h"
+#include "base/scoped_observation.h"
 #include "chrome/browser/ui/autofill/autofill_bubble_handler.h"
 #include "chrome/browser/ui/views/profiles/avatar_toolbar_button.h"
 #include "components/autofill/core/browser/personal_data_manager.h"
@@ -70,10 +70,10 @@ class AutofillBubbleHandlerImpl : public AutofillBubbleHandler,
   // button after the highlight animation finishes.
   bool should_show_sign_in_promo_if_applicable_ = false;
 
-  ScopedObserver<PersonalDataManager, PersonalDataManagerObserver>
-      personal_data_manager_observer_{this};
-  ScopedObserver<AvatarToolbarButton, AvatarToolbarButton::Observer>
-      avatar_toolbar_button_observer_{this};
+  base::ScopedObservation<PersonalDataManager, PersonalDataManagerObserver>
+      personal_data_manager_observation_{this};
+  base::ScopedObservation<AvatarToolbarButton, AvatarToolbarButton::Observer>
+      avatar_toolbar_button_observation_{this};
 
   DISALLOW_COPY_AND_ASSIGN(AutofillBubbleHandlerImpl);
 };