Remove transitional WEBLAYER_IS_PURE_VIRTUAL code

ui/compositor/compositor.cc

Index: ui/compositor/compositor.cc
diff --git a/ui/compositor/compositor.cc b/ui/compositor/compositor.cc
index edc79e3096429634229750f39d80acf55316a73b..43fe3a95a6f8e0ac3ff59fa321e0c5f222340fe5 100644
--- a/ui/compositor/compositor.cc
+++ b/ui/compositor/compositor.cc
@@ -150,25 +150,14 @@ Compositor::Compositor(CompositorDelegate* delegate,
   settings.refreshRate =
       test_compositor_enabled ? kTestRefreshRate : kDefaultRefreshRate;
 
-#if defined(WEBLAYER_IS_PURE_VIRTUAL)
   host_.initialize(this, *root_web_layer_, settings);
   root_web_layer_->setAnchorPoint(WebKit::WebFloatPoint(0.f, 0.f));
-#else
-  host_.initialize(this, root_web_layer_, settings);
-  root_web_layer_.setAnchorPoint(WebKit::WebFloatPoint(0.f, 0.f));
-#endif
   host_.setSurfaceReady();
 }
 
 Compositor::~Compositor() {
   // Don't call |CompositorDelegate::ScheduleDraw| from this point.
   delegate_ = NULL;
-#if !defined(WEBLAYER_IS_PURE_VIRTUAL)
-  // There's a cycle between |root_web_layer_| and |host_|, which results in
-  // leaking and/or crashing. Explicitly set the root layer to NULL so the cycle
-  // is broken.
-  host_.setRootLayer(NULL);
-#endif
   if (root_layer_)
     root_layer_->SetCompositor(NULL);
 
@@ -219,15 +208,9 @@ void Compositor::SetRootLayer(Layer* root_layer) {
   root_layer_ = root_layer;
   if (root_layer_ && !root_layer_->GetCompositor())
     root_layer_->SetCompositor(this);
-#if defined(WEBLAYER_IS_PURE_VIRTUAL)
   root_web_layer_->removeAllChildren();
   if (root_layer_)
     root_web_layer_->addChild(root_layer_->web_layer());
-#else
-  root_web_layer_.removeAllChildren();
-  if (root_layer_)
-    root_web_layer_.addChild(root_layer_->web_layer());
-#endif
 }
 
 void Compositor::Draw(bool force_clear) {
@@ -281,11 +264,7 @@ void Compositor::SetScaleAndSize(float scale, const gfx::Size& size_in_pixel) {
     return;
   size_ = size_in_pixel;
   host_.setViewportSize(size_in_pixel);
-#if defined(WEBLAYER_IS_PURE_VIRTUAL)
   root_web_layer_->setBounds(size_in_pixel);
-#else
-  root_web_layer_.setBounds(size_in_pixel);
-#endif
 
   if (device_scale_factor_ != scale) {
     device_scale_factor_ = scale;