Set class names for ime's view classes.

ui/chromeos/ime/candidate_view.cc

Index: ui/chromeos/ime/candidate_view.cc
diff --git a/ui/chromeos/ime/candidate_view.cc b/ui/chromeos/ime/candidate_view.cc
index 96b1de6c60ceae0a3e9ca15dd85c631c134c4ce0..db90b6fc89ea89a5aadaf997b8dd3d0e12a9fc34 100644
--- a/ui/chromeos/ime/candidate_view.cc
+++ b/ui/chromeos/ime/candidate_view.cc
@@ -27,6 +27,7 @@ class VerticalCandidateLabel : public views::Label {
  private:
   ~VerticalCandidateLabel() override {}
 
+  // views::Label:
   // Returns the preferred size, but guarantees that the width has at
   // least kMinCandidateLabelWidth pixels.
   gfx::Size GetPreferredSize() const override {
@@ -36,6 +37,8 @@ class VerticalCandidateLabel : public views::Label {
     return size;
   }
 
+  const char* GetClassName() const override { return "VerticalCandidateLabel"; }
+
   DISALLOW_COPY_AND_ASSIGN(VerticalCandidateLabel);
 };
 
@@ -227,6 +230,10 @@ void CandidateView::StateChanged() {
     SetHighlighted(true);
 }
 
+const char* CandidateView::GetClassName() const {
+  return "CandidateView";
+}
+
 bool CandidateView::OnMouseDragged(const ui::MouseEvent& event) {
   if (!HitTestPoint(event.location())) {
     // Moves the drag target to the sibling view.