Revert of Improve performance of GeometryMapper cache.

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

Index: third_party/WebKit/Source/core/paint/PaintLayerClipperTest.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintLayerClipperTest.cpp b/third_party/WebKit/Source/core/paint/PaintLayerClipperTest.cpp
index 8645e8bc4304fb397260bd78b47111d9c5b9db96..9f5199c61b4e2b6d4ea99b0760c87b72dd0b3fc1 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayerClipperTest.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintLayerClipperTest.cpp
@@ -30,6 +30,11 @@
   void TearDown() override {
     LayoutTestSupport::setMockThemeEnabledForTest(false);
     RenderingTest::TearDown();
+  }
+
+  bool geometryMapperCacheEmpty(const PaintLayerClipper& clipper) {
+    return clipper.m_geometryMapper->m_transformCache.isEmpty() &&
+           clipper.m_geometryMapper->m_clipCache.isEmpty();
   }
 };