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 9f5199c61b4e2b6d4ea99b0760c87b72dd0b3fc1..8645e8bc4304fb397260bd78b47111d9c5b9db96 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayerClipperTest.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintLayerClipperTest.cpp
@@ -31,11 +31,6 @@ class PaintLayerClipperTest : public ::testing::WithParamInterface<bool>,
     LayoutTestSupport::setMockThemeEnabledForTest(false);
     RenderingTest::TearDown();
   }
-
-  bool geometryMapperCacheEmpty(const PaintLayerClipper& clipper) {
-    return clipper.m_geometryMapper->m_transformCache.isEmpty() &&
-           clipper.m_geometryMapper->m_clipCache.isEmpty();
-  }
 };
 
 INSTANTIATE_TEST_CASE_P(All,