Fix paint property under-invalidation of CSS clip on resize

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

 // Copyright 2016 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/html/HTMLIFrameElement.h"
 #include "core/paint/PaintPropertyTreeBuilderTest.h"
 #include "core/paint/PaintPropertyTreePrinter.h"
 
 namespace blink {
 
@@ skipping 632 matching lines @@
   auto* transformObject = transform->layoutObject();
   EXPECT_EQ(TransformationMatrix().translate3d(50, 100, 0),
             transformObject->paintProperties()->transform()->matrix());
 
   transform->setAttribute(HTMLNames::styleAttr, "width: 200px; height: 300px;");
   document().view()->updateAllLifecyclePhases();
   EXPECT_EQ(TransformationMatrix().translate3d(100, 150, 0),
             transformObject->paintProperties()->transform()->matrix());
 }
 
+TEST_P(PaintPropertyTreeUpdateTest, CSSClipDependingOnSize) {
+  setBodyInnerHTML(
+      "<style>"
+      "  body { margin: 0 }"
+      "  #outer {"
+      "    position: absolute;"
+      "    width: 100px; height: 100px; top: 50px; left: 50px;"
+      "  }"
+      "  #clip {"
+      "    position: absolute;"
+      "    clip: rect(auto auto auto -5px);"
+      "    top: 0; left: 0; right: 0; bottom: 0;"
+      "  }"
+      "</style>"
+      "<div id='outer'>"
+      "  <div id='clip'></div>"
+      "</div>");
+
+  auto* outer = document().getElementById("outer");
+  auto* clip = getLayoutObjectByElementId("clip");
+  EXPECT_EQ(FloatRect(45, 50, 105, 100),
+            clip->paintProperties()->cssClip()->clipRect().rect());
+
+  outer->setAttribute(HTMLNames::styleAttr, "height: 200px");
+  document().view()->updateAllLifecyclePhases();
+  EXPECT_EQ(FloatRect(45, 50, 105, 200),
+            clip->paintProperties()->cssClip()->clipRect().rect());
+}
+
 }  // namespace blink