Introduce no parameter variant of FrameSelection::SelectAll() to avoid default parameter

This patch introduces no parameter variant of |FrameSelection::SelectAll()| to
avoid default parameter for a preparation of moving declaration of enum class
|SetSelectionBy| to another file[1].

[1] http://crrev.com/c/569662: ALL-IN-ONE Introduce SetSelectionData for FrameSelection::SetSelection()

Change-Id: I5860c9f2cb72bb052727dc1dbd0546dc561bb3f1
Reviewed-on: https://chromium-review.googlesource.com/580175Reviewed-by: Yoichi Osato <yoichio@chromium.org>
Commit-Queue: Yoichi Osato <yoichio@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488620}

third_party/WebKit/Source/core/editing/FrameSelection.cpp

@@ -700,6 +700,10 @@ void FrameSelection::SelectAll(SetSelectionBy set_selection_by) {
   }
 }
 
+void FrameSelection::SelectAll() {
+  SelectAll(SetSelectionBy::kSystem);
+}
+
 void FrameSelection::NotifyAccessibilityForSelectionChange() {
   if (GetSelectionInDOMTree().IsNone())
     return;

third_party/WebKit/Source/core/editing/FrameSelection.h

@@ -121,7 +121,8 @@ class CORE_EXPORT FrameSelection final
                     SetSelectionOptions = kCloseTyping | kClearTypingStyle,
                     CursorAlignOnScroll = CursorAlignOnScroll::kIfNeeded,
                     TextGranularity = TextGranularity::kCharacter);
-  void SelectAll(SetSelectionBy = SetSelectionBy::kSystem);
+  void SelectAll(SetSelectionBy);
+  void SelectAll();
   void Clear();
   bool IsHidden() const;