cc: Compute target space transform dynamically

cc/trees/layer_tree_host_common_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_common.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <memory>
@@ skipping 82 matching lines @@
 
 #define EXPECT_IDEAL_SCALE_EQ(expected, layer)                 \
   do {                                                         \
     EXPECT_FLOAT_EQ(expected, layer->GetIdealContentsScale()); \
   } while (false)
 
 class LayerTreeSettingsScaleContent : public LayerTreeSettings {
  public:
   LayerTreeSettingsScaleContent() {
     layer_transforms_should_scale_layer_contents = true;
+    verify_transform_tree_calculations = true;
   }
 };
 
 class LayerTreeHostCommonScalingTest : public LayerTreeHostCommonTest {
  public:
   LayerTreeHostCommonScalingTest()
       : LayerTreeHostCommonTest(LayerTreeSettingsScaleContent()) {}
 };
 
 class LayerTreeHostCommonDrawRectsTest : public LayerTreeHostCommonTest {
@@ skipping 5257 matching lines @@
   scoped_refptr<AnimationTimeline> timeline() { return timeline_; }
 
  protected:
   LayerTreeSettings LCDTextTestLayerTreeSettings() {
     LayerTreeSettings settings = LayerTreeSettings();
 
     can_use_lcd_text_ = std::tr1::get<0>(GetParam());
     layers_always_allowed_lcd_text_ = std::tr1::get<1>(GetParam());
     settings.can_use_lcd_text = can_use_lcd_text_;
     settings.layers_always_allowed_lcd_text = layers_always_allowed_lcd_text_;
+    settings.verify_transform_tree_calculations = true;
     return settings;
   }
 
   void SetUp() override {
     timeline_ =
         AnimationTimeline::Create(AnimationIdProvider::NextTimelineId());
     host_impl_.animation_host()->AddAnimationTimeline(timeline_);
 
     std::unique_ptr<LayerImpl> root_ptr =
         LayerImpl::Create(host_impl_.active_tree(), 1);
@@ skipping 5152 matching lines @@
   EXPECT_EQ(scroll_child6.id, grand_child10->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, parent3->scroll_tree_index());
   EXPECT_EQ(scroll_child7.id, child8->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, parent4->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, child9->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, grand_child12->scroll_tree_index());
 }
 
 }  // namespace
 }  // namespace cc