Revert of Don't pass subpixel offsets through non-translation transforms

third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilderTest.cpp

 // Copyright 2015 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 "core/paint/PaintPropertyTreeBuilderTest.h"
 
 #include "core/html/HTMLIFrameElement.h"
 #include "core/layout/LayoutTreeAsText.h"
 #include "core/paint/ObjectPaintProperties.h"
 #include "core/paint/PaintPropertyTreePrinter.h"
@@ skipping 1749 matching lines @@
   // Visual rects via the non-paint properties system use enclosingIntRect
   // before applying transforms, because they are computed bottom-up and
   // therefore can't apply pixel snapping. Therefore apply a slop of 1px.
   CHECK_VISUAL_RECT(LayoutRect(LayoutUnit(0.7) + LayoutUnit(0.7),
                                LayoutUnit(0.7) + LayoutUnit(0.7),
                                LayoutUnit(40), LayoutUnit(40)),
                     c, frame_view->GetLayoutView(), 1);
 }
 
 TEST_P(PaintPropertyTreeBuilderTest,
-       NonTranslationTransformShouldResetSubpixelPaintOffset) {
-  SetBodyInnerHTML(
-      "<style>"
-      "  * { margin: 0; }"
-      "  div { position: relative; }"
-      "  #a {"
-      "    width: 70px;"
-      "    height: 70px;"
-      "    left: 0.8px;"
-      "    top: 0.8px;"
-      "  }"
-      "  #b {"
-      "    width: 40px;"
-      "    height: 40px;"
-      "    transform: scale(10);"
-      "    transform-origin: 0 0;"
-      "  }"
-      "  #c {"
-      "    width: 40px;"
-      "    height: 40px;"
-      "    left: 0.6px;"
-      "    top: 0.6px;"
-      "  }"
-      "</style>"
-      "<div id='a'>"
-      "  <div id='b'>"
-      "    <div id='c'></div>"
-      "  </div>"
-      "</div>");
-  FrameView* frame_view = GetDocument().View();
-
-  LayoutUnit a_offset = LayoutUnit(0.8);
-  LayoutUnit c_offset = LayoutUnit(0.6);
-
-  LayoutObject* b = GetDocument().getElementById("b")->GetLayoutObject();
-  const ObjectPaintProperties* b_properties = b->PaintProperties();
-  EXPECT_EQ(TransformationMatrix().Scale(10),
-            b_properties->Transform()->Matrix());
-  // The paint offset transform should not be snapped.
-  EXPECT_EQ(TransformationMatrix().Translate(a_offset.ToDouble(),
-                                             a_offset.ToDouble()),
-            b_properties->Transform()->Parent()->Matrix());
-  EXPECT_EQ(LayoutPoint(), b->PaintOffset());
-  CHECK_EXACT_VISUAL_RECT(
-      LayoutRect(a_offset, a_offset, LayoutUnit(400), LayoutUnit(400)), b,
-      frame_view->GetLayoutView());
-
-  // c's painting should start at c_offset.
-  LayoutObject* c = GetDocument().getElementById("c")->GetLayoutObject();
-  EXPECT_EQ(LayoutPoint(c_offset, c_offset), c->PaintOffset());
-  // Visual rects via the non-paint properties system use enclosingIntRect
-  // before applying transforms, because they are computed bottom-up and
-  // therefore can't apply pixel snapping. Therefore apply a slop of
-  // c_offset * 10 + 1px.
-  CHECK_VISUAL_RECT(
-      LayoutRect(c_offset * 10 + a_offset, c_offset * 10 + a_offset,
-                 LayoutUnit(400), LayoutUnit(400)),
-      c, frame_view->GetLayoutView(), c_offset * 10 + 1);
-}
-
-TEST_P(PaintPropertyTreeBuilderTest,
        PaintOffsetWithPixelSnappingThroughMultipleTransforms) {
   SetBodyInnerHTML(
       "<style>"
       "  * { margin: 0; }"
       "  div { position: relative; }"
       "  #a {"
       "    width: 70px;"
       "    height: 70px;"
       "    left: 0.7px;"
       "    top: 0.7px;"
@@ skipping 1690 matching lines @@
 
   LayoutObject& svg_root =
       *GetDocument().getElementById("svgroot")->GetLayoutObject();
   const ObjectPaintProperties* svg_root_properties = svg_root.PaintProperties();
   EXPECT_TRUE(svg_root_properties->Effect());
   EXPECT_EQ(EffectPaintPropertyNode::Root(),
             svg_root_properties->Effect()->Parent());
 }
 
 }  // namespace blink