Move LayerHitTestRects to a separate file.

third_party/WebKit/Source/core/testing/Internals.h

Index: third_party/WebKit/Source/core/testing/Internals.h
diff --git a/third_party/WebKit/Source/core/testing/Internals.h b/third_party/WebKit/Source/core/testing/Internals.h
index ad24b98b003462738fa4d183f305f62795912f23..25f8d0557ba2f9033ec3c587f0b5dc5de25bf3d7 100644
--- a/third_party/WebKit/Source/core/testing/Internals.h
+++ b/third_party/WebKit/Source/core/testing/Internals.h
@@ -42,6 +42,7 @@
 
 namespace blink {
 
+class Animation;
 class CallbackFunctionTest;
 class CanvasRenderingContext;
 class ClientRect;
@@ -54,12 +55,14 @@ class DocumentMarker;
 class Element;
 class ExceptionState;
 class GCObservation;
+class HTMLSelectElement;
 class HTMLMediaElement;
 class InternalRuntimeFlags;
 class InternalSettings;
 class LayerRectList;
 class LocalDOMWindow;
 class LocalFrame;
+class Location;
 class Node;
 class OriginTrialsTest;
 class Page;