Fix common axes logic to detect negated axes as not common

third_party/WebKit/Source/platform/transforms/RotationTest.cpp

Index: third_party/WebKit/Source/platform/transforms/RotationTest.cpp
diff --git a/third_party/WebKit/Source/platform/transforms/RotationTest.cpp b/third_party/WebKit/Source/platform/transforms/RotationTest.cpp
index e5290c7f53bb5e60b8dc1f82c0fea82197b0a199..d775e2117146311dd03f513aa8e2119ef981229d 100644
--- a/third_party/WebKit/Source/platform/transforms/RotationTest.cpp
+++ b/third_party/WebKit/Source/platform/transforms/RotationTest.cpp
@@ -58,6 +58,10 @@ TEST(RotationTest, GetCommonAxisTest) {
   EXPECT_FALSE(Rotation::getCommonAxis(Rotation(FloatPoint3D(1, 2, 3), 50),
                                        Rotation(FloatPoint3D(3, 2, 1), 100),
                                        axis, angleA, angleB));
+
+  EXPECT_FALSE(Rotation::getCommonAxis(Rotation(FloatPoint3D(1, 2, 3), 50),
+                                       Rotation(FloatPoint3D(-1, -2, -3), 100),
+                                       axis, angleA, angleB));
 }
 
 }  // namespace blink