Remove transitional WEBLAYERTREEVIEW_IS_PURE_VIRTUAL guarded code

ui/compositor/compositor.cc

Index: ui/compositor/compositor.cc
diff --git a/ui/compositor/compositor.cc b/ui/compositor/compositor.cc
index b129ef610ac1d69e9309cf80ea9145b54d28ef88..0aea24187a88b7c398e0cbfac92e249d29ed0750 100644
--- a/ui/compositor/compositor.cc
+++ b/ui/compositor/compositor.cc
@@ -154,14 +154,9 @@ Compositor::Compositor(CompositorDelegate* delegate,
       test_compositor_enabled ? kTestRefreshRate : kDefaultRefreshRate;
 
   root_web_layer_->setAnchorPoint(WebKit::WebFloatPoint(0.f, 0.f));
-#if defined(WEBLAYERTREEVIEW_IS_PURE_VIRTUAL)
   host_.reset(WebKit::WebLayerTreeView::create(this, *root_web_layer_,
                                                settings));
   host_->setSurfaceReady();
-#else
-  host_.initialize(this, *root_web_layer_, settings);
-  host_.setSurfaceReady();
-#endif
 }
 
 Compositor::~Compositor() {
@@ -203,11 +198,7 @@ void Compositor::ScheduleDraw() {
     // TODO(nduca): Temporary while compositor calls
     // compositeImmediately() directly.
     layout();
-#if defined(WEBLAYERTREEVIEW_IS_PURE_VIRTUAL)
     host_->composite();
-#else
-    host_.composite();
-#endif
   } else if (delegate_) {
     delegate_->ScheduleDraw();
   }
@@ -239,21 +230,13 @@ void Compositor::Draw(bool force_clear) {
   // TODO(nduca): Temporary while compositor calls
   // compositeImmediately() directly.
   layout();
-#if defined(WEBLAYERTREEVIEW_IS_PURE_VIRTUAL)
   host_->composite();
-#else
-  host_.composite();
-#endif
   if (!g_compositor_thread && !swap_posted_)
     NotifyEnd();
 }
 
 void Compositor::ScheduleFullDraw() {
-#if defined(WEBLAYERTREEVIEW_IS_PURE_VIRTUAL)
   host_->setNeedsRedraw();
-#else
-  host_.setNeedsRedraw();
-#endif
 }
 
 bool Compositor::ReadPixels(SkBitmap* bitmap,
@@ -271,11 +254,7 @@ bool Compositor::ReadPixels(SkBitmap* bitmap,
   bitmap->allocPixels();
   SkAutoLockPixels lock_image(*bitmap);
   unsigned char* pixels = static_cast<unsigned char*>(bitmap->getPixels());
-#if defined(WEBLAYERTREEVIEW_IS_PURE_VIRTUAL)
   if (host_->compositeAndReadback(
-#else
-  if (host_.compositeAndReadback(
-#endif
           pixels, gfx::Rect(new_origin, bounds_in_pixel.size()))) {
     SwizzleRGBAToBGRAAndFlip(pixels, bounds_in_pixel.size());
     return true;
@@ -288,11 +267,7 @@ void Compositor::SetScaleAndSize(float scale, const gfx::Size& size_in_pixel) {
   if (size_in_pixel.IsEmpty() || scale <= 0)
     return;
   size_ = size_in_pixel;
-#if defined(WEBLAYERTREEVIEW_IS_PURE_VIRTUAL)
   host_->setViewportSize(size_in_pixel);
-#else
-  host_.setViewportSize(size_in_pixel);
-#endif
   root_web_layer_->setBounds(size_in_pixel);
 
   if (device_scale_factor_ != scale) {