cc: Remove impl_transform_is_unknown argument from OcclusionTracker.

cc/trees/quad_culler.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/quad_culler.h"
 
 #include "cc/debug/debug_colors.h"
 #include "cc/debug/overdraw_metrics.h"
 #include "cc/layers/append_quads_data.h"
 #include "cc/layers/layer_impl.h"
@@ skipping 66 matching lines @@
   return keep_quad;
 }
 
 bool QuadCuller::Append(scoped_ptr<DrawQuad> draw_quad,
                         AppendQuadsData* append_quads_data) {
   DCHECK(draw_quad->shared_quad_state == current_shared_quad_state_);
   DCHECK(!shared_quad_state_list_->empty());
   DCHECK(shared_quad_state_list_->back() == current_shared_quad_state_);
 
   gfx::Rect culled_rect;
-  bool impl_draw_transform_is_unknown = false;
-
   if (for_surface_) {
     culled_rect = occlusion_tracker_.UnoccludedContributingSurfaceContentRect(
         layer_, false, draw_quad->visible_rect);
   } else {
-    culled_rect = occlusion_tracker_.UnoccludedContentRect(
-        layer_->render_target(),
-        draw_quad->visible_rect,
-        draw_quad->quadTransform(),
-        impl_draw_transform_is_unknown);
+    culled_rect =
+        occlusion_tracker_.UnoccludedContentRect(layer_->render_target(),
+                                                 draw_quad->visible_rect,
+                                                 draw_quad->quadTransform());
   }
 
   return AppendQuadInternal(draw_quad.Pass(),
                             culled_rect,
                             quad_list_,
                             occlusion_tracker_,
                             layer_,
                             show_culling_with_debug_border_quads_);
 }
 
 }  // namespace cc