cc: Clean up OcclusionTracker template parameters.

cc/test/fake_painted_scrollbar_layer.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/test/fake_painted_scrollbar_layer.h"
 
 #include "base/auto_reset.h"
 #include "cc/resources/resource_update_queue.h"
 #include "cc/test/fake_scrollbar.h"
 
@@ skipping 17 matching lines @@
       update_count_(0),
       push_properties_count_(0),
       fake_scrollbar_(fake_scrollbar) {
   SetAnchorPoint(gfx::PointF(0.f, 0.f));
   SetBounds(gfx::Size(1, 1));
   SetIsDrawable(true);
 }
 
 FakePaintedScrollbarLayer::~FakePaintedScrollbarLayer() {}
 
-bool FakePaintedScrollbarLayer::Update(ResourceUpdateQueue* queue,
-                                       const OcclusionTracker* occlusion) {
+bool FakePaintedScrollbarLayer::Update(
+    ResourceUpdateQueue* queue,
+    const OcclusionTracker<Layer>* occlusion) {
   bool updated = PaintedScrollbarLayer::Update(queue, occlusion);
   ++update_count_;
   return updated;
 }
 
 void FakePaintedScrollbarLayer::PushPropertiesTo(LayerImpl* layer) {
   PaintedScrollbarLayer::PushPropertiesTo(layer);
   ++push_properties_count_;
 }
 
 scoped_ptr<base::AutoReset<bool> >
 FakePaintedScrollbarLayer::IgnoreSetNeedsCommit() {
   return make_scoped_ptr(
       new base::AutoReset<bool>(&ignore_set_needs_commit_, true));
 }
 
 }  // namespace cc