Revert of Always create top controls manager

cc/trees/layer_tree_host_impl_unittest.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/trees/layer_tree_host_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/bind.h"
@@ skipping 2460 matching lines @@
 
 // TODO(bokan): Convert these tests to create inner and outer viewports.
 class LayerTreeHostImplTopControlsTest : public LayerTreeHostImplTest {
  public:
   LayerTreeHostImplTopControlsTest()
       // Make the clip size the same as the layer (content) size so the layer is
       // non-scrollable.
       : layer_size_(10, 10),
         clip_size_(layer_size_),
         top_controls_height_(50) {
+    settings_.calculate_top_controls_position = true;
     settings_.use_pinch_virtual_viewport = true;
 
     viewport_size_ = gfx::Size(clip_size_.width(),
                                clip_size_.height() + top_controls_height_);
   }
 
   bool CreateHostImpl(const LayerTreeSettings& settings,
                       scoped_ptr<OutputSurface> output_surface) override {
     bool init =
         LayerTreeHostImplTest::CreateHostImpl(settings, output_surface.Pass());
-    if (init) {
+    if (init && settings.calculate_top_controls_position) {
       host_impl_->active_tree()->set_top_controls_height(top_controls_height_);
       host_impl_->active_tree()->SetCurrentTopControlsShownRatio(1.f);
     }
     return init;
   }
 
   void SetupTopControlsAndScrollLayer() {
     scoped_ptr<LayerImpl> root =
         LayerImpl::Create(host_impl_->active_tree(), 1);
     scoped_ptr<LayerImpl> root_clip =
@@ skipping 4943 matching lines @@
     EXPECT_EQ(0, set_needs_commit_count);
     EXPECT_EQ(2, set_needs_redraw_count);
     EXPECT_EQ(1, forward_to_main_count);
   }
 }
 
 class LayerTreeHostImplWithTopControlsTest : public LayerTreeHostImplTest {
  public:
   void SetUp() override {
     LayerTreeSettings settings = DefaultSettings();
+    settings.calculate_top_controls_position = true;
     CreateHostImpl(settings, CreateOutputSurface());
     host_impl_->active_tree()->set_top_controls_height(top_controls_height_);
     host_impl_->sync_tree()->set_top_controls_height(top_controls_height_);
     host_impl_->active_tree()->SetCurrentTopControlsShownRatio(1.f);
   }
 
  protected:
   static const int top_controls_height_;
 };
 
@@ skipping 1008 matching lines @@
   // surface.
   EXPECT_EQ(0, num_lost_surfaces_);
   host_impl_->DidLoseOutputSurface();
   EXPECT_EQ(1, num_lost_surfaces_);
   host_impl_->DidLoseOutputSurface();
   EXPECT_LE(1, num_lost_surfaces_);
 }
 
 }  // namespace
 }  // namespace cc