Left side vertical MD scrollbars grow toward right.

cc/layers/painted_scrollbar_layer_impl.cc

 // Copyright 2013 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 "cc/layers/painted_scrollbar_layer_impl.h"
 
 #include <algorithm>
 
 #include "base/memory/ptr_util.h"
 #include "cc/input/scrollbar_animation_controller.h"
 #include "cc/layers/layer.h"
 #include "cc/quads/solid_color_draw_quad.h"
 #include "cc/quads/texture_draw_quad.h"
 #include "cc/trees/layer_tree_impl.h"
 #include "cc/trees/layer_tree_settings.h"
 #include "cc/trees/occlusion.h"
 #include "ui/gfx/geometry/rect_conversions.h"
 
 namespace cc {
 
 std::unique_ptr<PaintedScrollbarLayerImpl> PaintedScrollbarLayerImpl::Create(
     LayerTreeImpl* tree_impl,
     int id,
-    ScrollbarOrientation orientation) {
-  return base::WrapUnique(
-      new PaintedScrollbarLayerImpl(tree_impl, id, orientation));
+    ScrollbarOrientation orientation,
+    bool is_left_side_vertical_scrollbar,
+    bool is_overlay) {
+  return base::WrapUnique(new PaintedScrollbarLayerImpl(
+      tree_impl, id, orientation, is_left_side_vertical_scrollbar, is_overlay));
 }
 
 PaintedScrollbarLayerImpl::PaintedScrollbarLayerImpl(
     LayerTreeImpl* tree_impl,
     int id,
-    ScrollbarOrientation orientation)
-    : ScrollbarLayerImplBase(tree_impl, id, orientation, false, false),
+    ScrollbarOrientation orientation,
+    bool is_left_side_vertical_scrollbar,
+    bool is_overlay)
+    : ScrollbarLayerImplBase(tree_impl,
+                             id,
+                             orientation,
+                             is_left_side_vertical_scrollbar,
+                             is_overlay),
       track_ui_resource_id_(0),
       thumb_ui_resource_id_(0),
       thumb_opacity_(1.f),
       internal_contents_scale_(1.f),
       thumb_thickness_(0),
       thumb_length_(0),
       track_start_(0),
       track_length_(0) {}
 
 PaintedScrollbarLayerImpl::~PaintedScrollbarLayerImpl() {}
 
 std::unique_ptr<LayerImpl> PaintedScrollbarLayerImpl::CreateLayerImpl(
     LayerTreeImpl* tree_impl) {
-  return PaintedScrollbarLayerImpl::Create(tree_impl, id(), orientation());
+  return PaintedScrollbarLayerImpl::Create(tree_impl, id(), orientation(),
+                                           is_left_side_vertical_scrollbar(),
+                                           is_overlay_scrollbar());
 }
 
 void PaintedScrollbarLayerImpl::PushPropertiesTo(LayerImpl* layer) {
   ScrollbarLayerImplBase::PushPropertiesTo(layer);
 
   PaintedScrollbarLayerImpl* scrollbar_layer =
       static_cast<PaintedScrollbarLayerImpl*>(layer);
 
   scrollbar_layer->set_internal_contents_scale_and_bounds(
       internal_contents_scale_, internal_content_bounds_);
@@ skipping 134 matching lines @@
 
 bool PaintedScrollbarLayerImpl::IsThumbResizable() const {
   return false;
 }
 
 const char* PaintedScrollbarLayerImpl::LayerTypeAsString() const {
   return "cc::PaintedScrollbarLayerImpl";
 }
 
 }  // namespace cc