Refactor IntersectionGeometry class and move it to core/layout.

third_party/WebKit/Source/core/dom/IntersectionObserver.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/dom/IntersectionObserver.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/css/parser/CSSParserTokenRange.h"
 #include "core/css/parser/CSSTokenizer.h"
 #include "core/dom/Element.h"
@@ skipping 252 matching lines @@
   if (target->document() == rootNode()->document()) {
     shouldReportRootBounds = true;
     isDOMDescendant = rootNode()->isShadowIncludingInclusiveAncestorOf(target);
   } else if (targetFrame && rootFrame) {
     shouldReportRootBounds =
         targetFrame->securityContext()->getSecurityOrigin()->canAccess(
             rootFrame->securityContext()->getSecurityOrigin());
     isDOMDescendant = (targetFrame->tree().top() == rootFrame);
   }
 
-  IntersectionObservation* observation = new IntersectionObservation(
-      *this, *target,
-      shouldReportRootBounds
-          ? IntersectionGeometry::ReportRootBounds::kShouldReportRootBounds
-          : IntersectionGeometry::ReportRootBounds::kShouldNotReportRootBounds);
+  IntersectionObservation* observation =
+      new IntersectionObservation(*this, *target, shouldReportRootBounds);
   target->ensureIntersectionObserverData().addObservation(*observation);
   m_observations.add(observation);
 
   if (!isDOMDescendant) {
     m_root->document().addConsoleMessage(
         ConsoleMessage::create(JSMessageSource, WarningMessageLevel,
                                "IntersectionObserver.observe(target): target "
                                "element is not a descendant of root."));
     return;
   }
@@ skipping 130 matching lines @@
 
 DEFINE_TRACE(IntersectionObserver) {
   visitor->template registerWeakMembers<
       IntersectionObserver, &IntersectionObserver::clearWeakMembers>(this);
   visitor->trace(m_callback);
   visitor->trace(m_observations);
   visitor->trace(m_entries);
 }
 
 }  // namespace blink