Avoid checking overlay ResourcePool in non CA Layer

Overlay ResourcePool is only used for CA layer.
BUG=None

Change-Id: Id37572e65d1b7a2c3307fa80be9820a94d693f7a
Reviewed-on: https://chromium-review.googlesource.com/685947Reviewed-by: Antoine Labour <piman@chromium.org>
Commit-Queue: Xing Xu <xing.xu@intel.com>
Cr-Commit-Position: refs/heads/master@{#505913}

components/viz/service/display/gl_renderer.cc

@@ -3393,12 +3393,7 @@ void GLRenderer::ScheduleCALayers() {
 }
 
 void GLRenderer::ScheduleDCLayers() {
-  if (overlay_resource_pool_) {
-    overlay_resource_pool_->CheckBusyResources();
-  }
-
   scoped_refptr<DCLayerOverlaySharedState> shared_state;
-  size_t copied_render_pass_count = 0;
   for (DCLayerOverlay& dc_layer_overlay :
        current_frame()->dc_layer_overlay_list) {
     DCHECK(!dc_layer_overlay.rpdq);
@@ -3453,13 +3448,6 @@ void GLRenderer::ScheduleDCLayers() {
                                  dc_layer_overlay.edge_aa_mask, bounds_rect,
                                  filter);
   }
-
-  // Take the number of copied render passes in this frame, and use 3 times that
-  // amount as the cache limit.
-  if (overlay_resource_pool_) {
-    overlay_resource_pool_->SetResourceUsageLimits(
-        std::numeric_limits<std::size_t>::max(), copied_render_pass_count * 5);
-  }
 }
 
 void GLRenderer::ScheduleOverlays() {