Moved ButtonInkDropDelegate logic into InkDropHostView and deleted InkDropDelegates.

ui/views/animation/ink_drop_factory.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/views/animation/ink_drop_factory.h"
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "ui/base/material_design/material_design_controller.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/views/animation/ink_drop.h"
 #include "ui/views/animation/ink_drop_impl.h"
+#include "ui/views/animation/ink_drop_stub.h"
 #include "ui/views/views_export.h"
 
 namespace views {
 
-namespace {
-
-// A stub implementation of an InkDrop that can be used when material design is
-// not enabled.
-class InkDropStub : public InkDrop {
- public:
-  InkDropStub() {}
-  ~InkDropStub() override {}
-
-  // InkDrop:
-  InkDropState GetTargetInkDropState() const override {
-    return InkDropState::HIDDEN;
-  }
-  bool IsVisible() const override { return false; }
-  void AnimateToState(InkDropState state) override {}
-  void SnapToActivated() override {}
-  void SetHovered(bool is_hovered) override {}
-  void SetFocused(bool is_hovered) override {}
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(InkDropStub);
-};
-
-}  // namespace
-
 InkDropFactory::InkDropFactory() {}
 
 InkDropFactory::~InkDropFactory() {}
 
 std::unique_ptr<InkDrop> InkDropFactory::CreateInkDrop(
     InkDropHost* ink_drop_host) {
   if (ui::MaterialDesignController::IsModeMaterial()) {
     return base::WrapUnique(new InkDropImpl(ink_drop_host));
   }
 
   return base::WrapUnique(new InkDropStub());
 }
 
 }  // namespace views