cc: Clean up iterator template to only take 1 parameter.

cc/trees/occlusion_tracker_unittest.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/occlusion_tracker.h"
 
 #include "cc/animation/layer_animation_controller.h"
 #include "cc/base/math_util.h"
 #include "cc/debug/overdraw_metrics.h"
 #include "cc/layers/layer.h"
@@ skipping 104 matching lines @@
   }
 };
 
 struct OcclusionTrackerTestMainThreadTypes {
   typedef Layer LayerType;
   typedef FakeLayerTreeHost HostType;
   typedef RenderSurface RenderSurfaceType;
   typedef TestContentLayer ContentLayerType;
   typedef scoped_refptr<Layer> LayerPtrType;
   typedef scoped_refptr<ContentLayerType> ContentLayerPtrType;
-  typedef LayerIterator<Layer,
-                        RenderSurfaceLayerList,
-                        RenderSurface,
-                        LayerIteratorActions::FrontToBack> TestLayerIterator;
+  typedef LayerIterator<Layer> TestLayerIterator;
   typedef OcclusionTracker OcclusionTrackerType;
 
   static LayerPtrType CreateLayer(HostType*  host) { return Layer::Create(); }
   static ContentLayerPtrType CreateContentLayer(HostType* host) {
     return make_scoped_refptr(new ContentLayerType());
   }
 
   static LayerPtrType PassLayerPtr(ContentLayerPtrType* layer) {
     LayerPtrType ref(*layer);
     *layer = NULL;
     return ref;
   }
 
   static LayerPtrType PassLayerPtr(LayerPtrType* layer) {
     LayerPtrType ref(*layer);
     *layer = NULL;
     return ref;
   }
 
   static void DestroyLayer(LayerPtrType* layer) { *layer = NULL; }
 };
 
 struct OcclusionTrackerTestImplThreadTypes {
   typedef LayerImpl LayerType;
   typedef LayerTreeImpl HostType;
   typedef RenderSurfaceImpl RenderSurfaceType;
   typedef TestContentLayerImpl ContentLayerType;
   typedef scoped_ptr<LayerImpl> LayerPtrType;
   typedef scoped_ptr<ContentLayerType> ContentLayerPtrType;
-  typedef LayerIterator<LayerImpl,
-                        LayerImplList,
-                        RenderSurfaceImpl,
-                        LayerIteratorActions::FrontToBack> TestLayerIterator;
+  typedef LayerIterator<LayerImpl> TestLayerIterator;
   typedef OcclusionTrackerImpl OcclusionTrackerType;
 
   static LayerPtrType CreateLayer(HostType* host) {
     return LayerImpl::Create(host, next_layer_impl_id++);
   }
   static ContentLayerPtrType CreateContentLayer(HostType* host) {
     return make_scoped_ptr(new ContentLayerType(host, next_layer_impl_id++));
   }
   static int next_layer_impl_id;
 
@@ skipping 3651 matching lines @@
               occlusion.occlusion_from_outside_target().ToString());
     EXPECT_EQ(gfx::Rect().ToString(),
               occlusion.occlusion_from_inside_target().ToString());
   }
 };
 
 ALL_OCCLUSIONTRACKER_TEST(OcclusionTrackerTestEmptyEventLayerDoesNotOcclude)
 
 }  // namespace
 }  // namespace cc