Move second internal recursion to a precomputation in layer_tree_host_common.cc

cc/layer_impl.cc

 // Copyright 2011 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/layer_impl.h"
 
 #include "base/debug/trace_event.h"
 #include "base/stringprintf.h"
 #include "base/values.h"
 #include "cc/debug_border_draw_quad.h"
@@ skipping 90 matching lines @@
     layerTreeHostImpl()->setNeedsUpdateDrawProperties();
 }
 
 void LayerImpl::createRenderSurface()
 {
     DCHECK(!m_drawProperties.render_surface);
     m_drawProperties.render_surface = make_scoped_ptr(new RenderSurfaceImpl(this));
     m_drawProperties.render_target = this;
 }
 
-int LayerImpl::descendantsDrawContent()
-{
-    int result = 0;
-    for (size_t i = 0; i < m_children.size(); ++i) {
-        if (m_children[i]->drawsContent())
-            ++result;
-        result += m_children[i]->descendantsDrawContent();
-        if (result > 1)
-            return result;
-    }
-    return result;
-}
-
 LayerTreeHostImpl* LayerImpl::layerTreeHostImpl() const {
     return m_layerTreeImpl->layer_tree_host_impl();
 }
 
 scoped_ptr<SharedQuadState> LayerImpl::createSharedQuadState() const
 {
   scoped_ptr<SharedQuadState> state = SharedQuadState::Create();
   state->SetAll(m_drawProperties.target_space_transform,
                 m_drawProperties.visible_content_rect,
                 m_drawProperties.drawable_content_rect,
@@ skipping 51 matching lines @@
     SkColor color;
     float width;
     getDebugBorderProperties(&color, &width);
 
     gfx::Rect contentRect(gfx::Point(), contentBounds());
     scoped_ptr<DebugBorderDrawQuad> debugBorderQuad = DebugBorderDrawQuad::Create();
     debugBorderQuad->SetNew(sharedQuadState, contentRect, color, width);
     quadList.append(debugBorderQuad.PassAs<DrawQuad>(), appendQuadsData);
 }
 
+bool LayerImpl::hasDelegatedContent() const
+{
+    return false;
+}
+
 bool LayerImpl::hasContributingDelegatedRenderPasses() const
 {
     return false;
 }
 
 RenderPass::Id LayerImpl::firstContributingRenderPassId() const
 {
     return RenderPass::Id(0, 0);
 }
 
@@ skipping 575 matching lines @@
 
 void LayerImpl::setVerticalScrollbarLayer(ScrollbarLayerImpl* scrollbarLayer)
 {
     if (!m_scrollbarAnimationController)
         m_scrollbarAnimationController = ScrollbarAnimationController::create(this);
     m_scrollbarAnimationController->setVerticalScrollbarLayer(scrollbarLayer);
     m_scrollbarAnimationController->updateScrollOffset(this);
 }
 
 }  // namespace cc