Convert enum to enum class for InitialFocusStateOnMousePress

Use enum class instead of enum for InitialFocusStateOnMousePress.
enum class is more type safety.

Bug: 940736
Change-Id: I81dcb02659fe0c6295fa9b8a77684f31e6e8425e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2345824
Commit-Queue: Hwanseung Lee <hs1217.lee@samsung.com>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#796690}

ui/views/controls/label.cc

@@ -731,8 +731,9 @@ bool Label::OnMousePressed(const ui::MouseEvent& event) {
 
   return selection_controller_->OnMousePressed(
       event, false,
-      had_focus ? SelectionController::FOCUSED
-                : SelectionController::UNFOCUSED);
+      had_focus
+          ? SelectionController::InitialFocusStateOnMousePress::kFocused
+          : SelectionController::InitialFocusStateOnMousePress::kUnFocused);
 }
 
 bool Label::OnMouseDragged(const ui::MouseEvent& event) {

ui/views/controls/textfield/textfield.cc

@@ -764,8 +764,9 @@ bool Textfield::OnMousePressed(const ui::MouseEvent& event) {
 
   return selection_controller_.OnMousePressed(
       event, handled,
-      had_focus ? SelectionController::FOCUSED
-                : SelectionController::UNFOCUSED);
+      had_focus
+          ? SelectionController::InitialFocusStateOnMousePress::kFocused
+          : SelectionController::InitialFocusStateOnMousePress::kUnFocused);
 }
 
 bool Textfield::OnMouseDragged(const ui::MouseEvent& event) {

ui/views/selection_controller.cc

@@ -76,7 +76,7 @@ bool SelectionController::OnMousePressed(
 
   if (event.IsOnlyRightMouseButton()) {
     if (PlatformStyle::kSelectAllOnRightClickWhenUnfocused &&
-        initial_focus_state == InitialFocusStateOnMousePress::UNFOCUSED) {
+        initial_focus_state == InitialFocusStateOnMousePress::kUnFocused) {
       SelectAll();
     } else if (PlatformStyle::kSelectWordOnRightClick &&
                !render_text->IsPointInSelection(event.location()) &&

ui/views/selection_controller.h

@@ -30,9 +30,9 @@ class VIEWS_EXPORT SelectionController {
  public:
   // Describes whether the view managing the delegate was initially focused when
   // the mouse press was received.
-  enum InitialFocusStateOnMousePress {
-    FOCUSED,
-    UNFOCUSED,
+  enum class InitialFocusStateOnMousePress {
+    kFocused,
+    kUnFocused,
   };
 
   // |delegate| must be non-null.

ui/views/selection_controller_unittest.cc

@@ -123,8 +123,9 @@ class SelectionControllerTest : public ::testing::Test {
         ui::MouseEvent(ui::ET_MOUSE_PRESSED, location, location,
                        last_event_time_, mouse_flags_, button),
         false,
-        focused ? SelectionController::FOCUSED
-                : SelectionController::UNFOCUSED);
+        focused
+            ? SelectionController::InitialFocusStateOnMousePress::kFocused
+            : SelectionController::InitialFocusStateOnMousePress::kUnFocused);
   }
 
   void ReleaseMouseButton(int button) {