Transform animations should not collapse by default when interpolating

cc/test/geometry_test_utils.h

Index: cc/test/geometry_test_utils.h
diff --git a/cc/test/geometry_test_utils.h b/cc/test/geometry_test_utils.h
index 6e015131fa7d676dd378130cc2ff279e10b9657a..18618d14692397fa0f787966949dd1f0f90b63ea 100644
--- a/cc/test/geometry_test_utils.h
+++ b/cc/test/geometry_test_utils.h
@@ -5,6 +5,8 @@
 #ifndef CC_TEST_GEOMETRY_TEST_UTILS_H_
 #define CC_TEST_GEOMETRY_TEST_UTILS_H_
 
+#include "cc/cc_export.h"
+
 namespace gfx {
 class Transform;
 }
@@ -96,6 +98,16 @@ void ExpectTransformationMatrixEq(const gfx::Transform& expected,
     ExpectTransformationMatrixEq(expected, actual);       \
   } while (false)
 
+void ExpectTransformationMatrixNear(const gfx::Transform& expected,
+                                    const gfx::Transform& actual,
+                                    float abs_error);
+
+#define EXPECT_TRANSFORMATION_MATRIX_NEAR(expected, actual, abs_error) \
+  do {                                                                 \
+    SCOPED_TRACE("");                                                  \
+    ExpectTransformationMatrixNear(expected, actual, abs_error);       \
+  } while (false)
+
 // Should be used in test code only, for convenience. Production code should use
 // the gfx::Transform::GetInverse() API.
 gfx::Transform Inverse(const gfx::Transform& transform);