Use DEFINE_TESTCLASS_SHORT macro in tests.

tests/MathTest.cpp

Index: tests/MathTest.cpp
diff --git a/tests/MathTest.cpp b/tests/MathTest.cpp
index f5c61cbeb851673bc45fa2089ef59424a47e62fb..c647b54282fed333b2a7803231f5261005f73b6a 100644
--- a/tests/MathTest.cpp
+++ b/tests/MathTest.cpp
@@ -647,7 +647,7 @@ static void TestMath(skiatest::Reporter* reporter) {
 }
 
 #include "TestClassDef.h"
-DEFINE_TESTCLASS("Math", MathTestClass, TestMath)
+DEFINE_TESTCLASS_SHORT(TestMath)
 
 ///////////////////////////////////////////////////////////////////////////////
 
@@ -690,7 +690,7 @@ static void TestEndian(skiatest::Reporter* reporter) {
     }
 }
 
-DEFINE_TESTCLASS("Endian", EndianTestClass, TestEndian)
+DEFINE_TESTCLASS_SHORT(TestEndian)
 
 template <typename T>
 static void test_divmod(skiatest::Reporter* r) {