Make IsSolidColor() a property on CC scrollbar layers.

cc/trees/layer_tree_host_unittest_context.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/trees/layer_tree_host.h"
 
 #include "base/basictypes.h"
 #include "cc/base/thread_impl.h"
 #include "cc/layers/content_layer.h"
 #include "cc/layers/heads_up_display_layer.h"
@@ skipping 1157 matching lines @@
       io_surface_->SetIOSurfaceProperties(1, gfx::Size(10, 10));
       root_->AddChild(io_surface_);
     }
 
     // Enable the hud.
     LayerTreeDebugState debug_state;
     debug_state.show_property_changed_rects = true;
     layer_tree_host()->SetDebugState(debug_state);
 
     scoped_refptr<ScrollbarLayer> scrollbar_ = ScrollbarLayer::Create(
-        scoped_ptr<Scrollbar>(new FakeScrollbar).Pass(),
-        content_->id());
+        scoped_ptr<Scrollbar>(new FakeScrollbar).Pass(), content_->id(), false);
     scrollbar_->SetBounds(gfx::Size(10, 10));
     scrollbar_->SetAnchorPoint(gfx::PointF());
     scrollbar_->SetIsDrawable(true);
     root_->AddChild(scrollbar_);
 
     layer_tree_host()->SetRootLayer(root_);
     LayerTreeHostContextTest::SetupTree();
   }
 
   virtual void BeginTest() OVERRIDE {
@@ skipping 284 matching lines @@
 
 MULTI_THREAD_TEST_F(LayerTreeHostContextTestImplSidePainting);
 
 class ScrollbarLayerLostContext : public LayerTreeHostContextTest {
  public:
   ScrollbarLayerLostContext() : commits_(0) {}
 
   virtual void BeginTest() OVERRIDE {
     scoped_refptr<Layer> scroll_layer = Layer::Create();
     scrollbar_layer_ = FakeScrollbarLayer::Create(
-        false, true, scroll_layer->id());
+        false, true, scroll_layer->id(), false);
     scrollbar_layer_->SetBounds(gfx::Size(10, 100));
     layer_tree_host()->root_layer()->AddChild(scrollbar_layer_);
     layer_tree_host()->root_layer()->AddChild(scroll_layer);
     PostSetNeedsCommitToMainThread();
   }
 
   virtual void AfterTest() OVERRIDE {}
 
   virtual void CommitCompleteOnThread(LayerTreeHostImpl* impl) OVERRIDE {
     LayerTreeHostContextTest::CommitCompleteOnThread(impl);
@@ skipping 95 matching lines @@
         LayerTreeHost::Create(this, settings, impl_ccthread.Pass());
     EXPECT_FALSE(layer_tree_host);
   }
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(
     LayerTreeHostTestCannotCreateIfCannotCreateOutputSurface);
 
 }  // namespace
 }  // namespace cc