Ignore rounding error between clip_layer_length_ and scroll_layer_length_

cc/test/layer_test_common.h

 // 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.
 
 #ifndef CC_TEST_LAYER_TEST_COMMON_H_
 #define CC_TEST_LAYER_TEST_COMMON_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 124 matching lines @@
                       const C& c,
                       const D& d,
                       const E& e) {
       std::unique_ptr<T> layer = T::Create(host_->host_impl()->active_tree(),
                                            layer_impl_id_++, a, b, c, d, e);
       T* ptr = layer.get();
       root_layer_for_testing()->test_properties()->AddChild(std::move(layer));
       return ptr;
     }
 
+    template <typename T,
+              typename A,
+              typename B,
+              typename C,
+              typename D,
+              typename E>
+    T* AddChild(LayerImpl* parent,
+                const A& a,
+                const B& b,
+                const C& c,
+                const D& d,
+                const E& e) {
+      std::unique_ptr<T> layer = T::Create(host_->host_impl()->active_tree(),
+                                           layer_impl_id_++, a, b, c, d, e);
+      T* ptr = layer.get();
+      parent->test_properties()->AddChild(std::move(layer));
+      return ptr;
+    }
+
     void CalcDrawProps(const gfx::Size& viewport_size);
     void AppendQuadsWithOcclusion(LayerImpl* layer_impl,
                                   const gfx::Rect& occluded);
     void AppendQuadsForPassWithOcclusion(LayerImpl* layer_impl,
                                          RenderPass* given_render_pass,
                                          const gfx::Rect& occluded);
     void AppendSurfaceQuadsWithOcclusion(RenderSurfaceImpl* surface_impl,
                                          const gfx::Rect& occluded);
 
     void RequestCopyOfOutput();
@@ skipping 29 matching lines @@
     std::unique_ptr<RenderPass> render_pass_;
     scoped_refptr<AnimationTimeline> timeline_;
     scoped_refptr<AnimationTimeline> timeline_impl_;
     int layer_impl_id_;
   };
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_LAYER_TEST_COMMON_H_