ui: Prefer +/- operators to apply offsets.

cc/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 "config.h"
 
 #include "cc/layer_tree_host_common.h"
 
 #include "cc/content_layer.h"
 #include "cc/content_layer_client.h"
@@ skipping 3482 matching lines @@
     expectedChildTransform.translate(deviceScaleFactor * child->position().x(), deviceScaleFactor * child->position().y());
     EXPECT_TRANSFORMATION_MATRIX_EQ(expectedChildTransform, child->drawTransform());
     EXPECT_TRANSFORMATION_MATRIX_EQ(expectedChildTransform, child->screenSpaceTransform());
 
     // Verify results of transformed child rects
     gfx::RectF childContentBounds(gfx::PointF(), gfx::SizeF(child->contentBounds()));
 
     gfx::RectF childDrawRect = MathUtil::mapClippedRect(child->drawTransform(), childContentBounds);
     gfx::RectF childScreenSpaceRect = MathUtil::mapClippedRect(child->screenSpaceTransform(), childContentBounds);
 
-    gfx::RectF expectedChildDrawRect(gfx::PointF(), child->bounds());
-    expectedChildDrawRect.Offset(child->position().x(), child->position().y());
+    gfx::RectF expectedChildDrawRect(child->position(), child->bounds());
     expectedChildDrawRect.Scale(deviceScaleFactor);
     EXPECT_FLOAT_RECT_EQ(expectedChildDrawRect, childDrawRect);
     EXPECT_FLOAT_RECT_EQ(expectedChildDrawRect, childScreenSpaceRect);
 
     // Verify childNoScale transforms
     WebTransformationMatrix expectedChildNoScaleTransform = child->drawTransform();
     // All transforms operate on content rects. The child's content rect
     // incorporates device scale, but the childNoScale does not; add it here.
     expectedChildNoScaleTransform.scale(deviceScaleFactor);
     EXPECT_TRANSFORMATION_MATRIX_EQ(expectedChildNoScaleTransform, childNoScale->drawTransform());
@@ skipping 524 matching lines @@
     int nonexistentId = -1;
     EXPECT_EQ(root, LayerTreeHostCommon::findLayerInSubtree(root.get(), root->id()));
     EXPECT_EQ(child, LayerTreeHostCommon::findLayerInSubtree(root.get(), child->id()));
     EXPECT_EQ(grandChild, LayerTreeHostCommon::findLayerInSubtree(root.get(), grandChild->id()));
     EXPECT_EQ(maskLayer, LayerTreeHostCommon::findLayerInSubtree(root.get(), maskLayer->id()));
     EXPECT_EQ(replicaLayer, LayerTreeHostCommon::findLayerInSubtree(root.get(), replicaLayer->id()));
     EXPECT_EQ(0, LayerTreeHostCommon::findLayerInSubtree(root.get(), nonexistentId));
 }
 
 }  // anonymous namespace