[OsSettingsMetrics] Remove Per Session Tracker inherited class

Removes UserActionRecorder as an inherited class of the Per Session
tracker in preparation for an update to the UserActionRecorder class.

Bug: 1133553
Change-Id: I769e1723a107d4a6a0e32698068fa8a7cc34026f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2440307
Commit-Queue: Daniel Classon <dclasson@google.com>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#812501}

chrome/browser/ui/webui/settings/chromeos/search/per_session_settings_user_action_tracker.h

@@ -6,7 +6,6 @@
 #define CHROME_BROWSER_UI_WEBUI_SETTINGS_CHROMEOS_SEARCH_PER_SESSION_SETTINGS_USER_ACTION_TRACKER_H_
 
 #include "base/time/time.h"
-#include "chrome/browser/ui/webui/settings/chromeos/search/user_action_recorder.mojom.h"
 #include "mojo/public/cpp/bindings/pending_receiver.h"
 #include "mojo/public/cpp/bindings/receiver.h"
 
@@ -17,22 +16,21 @@ namespace settings {
 // This class is only meant to track actions from an individual settings
 // session; if the settings window is closed and reopened again, a new instance
 // should be created for that new session.
-class PerSessionSettingsUserActionTracker : public mojom::UserActionRecorder {
+class PerSessionSettingsUserActionTracker {
  public:
   PerSessionSettingsUserActionTracker();
   PerSessionSettingsUserActionTracker(
       const PerSessionSettingsUserActionTracker& other) = delete;
   PerSessionSettingsUserActionTracker& operator=(
       const PerSessionSettingsUserActionTracker& other) = delete;
-  ~PerSessionSettingsUserActionTracker() override;
+  ~PerSessionSettingsUserActionTracker();
 
-  // mojom::UserActionRecorder:
-  void RecordPageFocus() override;
-  void RecordPageBlur() override;
-  void RecordClick() override;
-  void RecordNavigation() override;
-  void RecordSearch() override;
-  void RecordSettingChange() override;
+  void RecordPageFocus();
+  void RecordPageBlur();
+  void RecordClick();
+  void RecordNavigation();
+  void RecordSearch();
+  void RecordSettingChange();
 
  private:
   friend class PerSessionSettingsUserActionTrackerTest;
@@ -61,8 +59,6 @@ class PerSessionSettingsUserActionTracker : public mojom::UserActionRecorder {
   // The last time at which a page blur event was received; if no blur events
   // have been received, this field is_null().
   base::TimeTicks last_blur_timestamp_;
-
-  mojo::Receiver<mojom::UserActionRecorder> receiver_{this};
 };
 
 }  // namespace settings