cc: Fix non root copy request visible rect in HighDPI

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 1448 matching lines @@
   // contents (at the new offset).
   ASSERT_TRUE(child->render_surface());
   EXPECT_EQ(gfx::RectF(50, 50, 25, 25),
             child->render_surface()->DrawableContentRect());
 }
 
 TEST_F(LayerTreeHostCommonTest, DrawableContentRectForReferenceFilterHighDpi) {
   const float device_scale_factor = 2.0f;
 
   LayerImpl* root = root_layer_for_testing();
-  root->layer_tree_impl()->SetDeviceScaleFactor(device_scale_factor);
   LayerImpl* child = AddChild<LayerImpl>(root);
   child->SetDrawsContent(true);
 
   SetLayerPropertiesForTesting(root, gfx::Transform(), gfx::Point3F(),
                                gfx::PointF(), gfx::Size(100, 100), true, false,
                                true);
   SetLayerPropertiesForTesting(child, gfx::Transform(), gfx::Point3F(),
                                gfx::PointF(), gfx::Size(25, 25), true, false,
                                true);
 
@@ skipping 3298 matching lines @@
   SetLayerPropertiesForTesting(scale_surface, scale_small_matrix,
                                gfx::Point3F(), gfx::PointF(2.f, 2.f),
                                gfx::Size(10, 10), false, true, true);
   scale_surface->SetDrawsContent(true);
 
   float device_scale_factor = 2.5f;
   float page_scale_factor = 3.f;
   root->layer_tree_impl()->SetViewportLayersFromIds(
       Layer::INVALID_ID, page_scale->id(), Layer::INVALID_ID,
       Layer::INVALID_ID);
-  root->layer_tree_impl()->SetDeviceScaleFactor(device_scale_factor);
   root->layer_tree_impl()->BuildLayerListAndPropertyTreesForTesting();
   root->layer_tree_impl()->SetPageScaleOnActiveTree(page_scale_factor);
   ExecuteCalculateDrawProperties(root, device_scale_factor, page_scale_factor,
                                  root);
 
   EXPECT_IDEAL_SCALE_EQ(device_scale_factor * page_scale_factor, parent);
   EXPECT_IDEAL_SCALE_EQ(device_scale_factor * page_scale_factor,
                         perspective_surface);
   // Ideal scale is the max 2d scale component of the combined transform up to
   // the nearest render target. Here this includes the layer transform as well
@@ skipping 1049 matching lines @@
   root->layer_tree_impl()->property_trees()->needs_rebuild = true;
 
   DCHECK(!copy_layer->test_properties()->copy_requests.empty());
   ExecuteCalculateDrawProperties(root);
   DCHECK(copy_layer->test_properties()->copy_requests.empty());
 
   EXPECT_EQ(gfx::Rect(50, 50), copy_layer->visible_layer_rect());
   EXPECT_EQ(gfx::Rect(10, 10), copy_child->visible_layer_rect());
   EXPECT_EQ(gfx::Rect(10, 10), copy_clipped_child->visible_layer_rect());
   EXPECT_EQ(gfx::Rect(5, 5), copy_surface->visible_layer_rect());
+
+  // Case 3: When there is device scale factor.
+  float device_scale_factor = 2.f;
+  copy_layer->test_properties()->copy_requests.push_back(
+      CopyOutputRequest::CreateRequest(base::Bind(&EmptyCopyOutputCallback)));
+
+  DCHECK(!copy_layer->test_properties()->copy_requests.empty());
+  ExecuteCalculateDrawProperties(root, device_scale_factor);
+  DCHECK(copy_layer->test_properties()->copy_requests.empty());
+
+  EXPECT_EQ(gfx::Rect(50, 50), copy_layer->visible_layer_rect());
+  EXPECT_EQ(gfx::Rect(10, 10), copy_child->visible_layer_rect());
+  EXPECT_EQ(gfx::Rect(10, 10), copy_clipped_child->visible_layer_rect());
+  EXPECT_EQ(gfx::Rect(5, 5), copy_surface->visible_layer_rect());
 }
 
 TEST_F(LayerTreeHostCommonTest, VisibleContentRectInsideSurface) {
   LayerImpl* root = root_layer_for_testing();
   LayerImpl* surface = AddChild<LayerImpl>(root);
   LayerImpl* surface_child = AddChild<LayerImpl>(surface);
 
   const gfx::Transform identity_matrix;
   SetLayerPropertiesForTesting(root, identity_matrix, gfx::Point3F(),
                                gfx::PointF(), gfx::Size(50, 50), true, false,
@@ skipping 4487 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