cc: Put context-loss tests in layer_tree_host_unittest_context.cc

cc/test/fake_scrollbar_layer.cc

 // Copyright 2012 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/test/fake_scrollbar_layer.h"
 
 #include "cc/test/fake_scrollbar_theme_painter.h"
 #include "cc/test/fake_web_scrollbar.h"
 #include "cc/test/fake_web_scrollbar_theme_geometry.h"
 
 namespace cc {
 
 FakeScrollbarLayer::FakeScrollbarLayer(
-    bool paint_during_update, int scrolling_layer_id)
+    bool paint_during_update, bool has_thumb, int scrolling_layer_id)
     : ScrollbarLayer(
         FakeWebScrollbar::create().PassAs<WebKit::WebScrollbar>(),
         FakeScrollbarThemePainter::Create(paint_during_update)
         .PassAs<ScrollbarThemePainter>(),
-        FakeWebScrollbarThemeGeometry::create()
+        FakeWebScrollbarThemeGeometry::create(has_thumb)
         .PassAs<WebKit::WebScrollbarThemeGeometry>(),
         scrolling_layer_id),
       update_count_(0) {
   setAnchorPoint(gfx::PointF(0, 0));
   setBounds(gfx::Size(1, 1));
   setIsDrawable(true);
 }
 
 FakeScrollbarLayer::~FakeScrollbarLayer() {}
 
 void FakeScrollbarLayer::update(
     ResourceUpdateQueue& queue,
     const OcclusionTracker* occlusion,
     RenderingStats& stats) {
   ScrollbarLayer::update(queue, occlusion, stats);
   update_count_++;
 }
 
 }  // namespace cc