GOOGLE3 -> SK_BUILD_FOR_GOOGLE3

This is more consistent with our other SK_BUILD_FOR_... macros,
and less likely to collide with other preprocessor logic.

(Luckily, this was defined in public.bzl, so we can do this
all in one CL in the Skia repo.)

Change-Id: I5f232888288c9c53fad445545d983d0fb0b4add8
Reviewed-on: https://skia-review.googlesource.com/86940
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>
diff --git a/tests/MatrixTest.cpp b/tests/MatrixTest.cpp
index 18d4908..ce1254e 100644
--- a/tests/MatrixTest.cpp
+++ b/tests/MatrixTest.cpp
@@ -684,8 +684,8 @@
     const float kRotation1 = -50.f;
     const float kScale0 = 5000.f;
 
-#if defined(GOOGLE3)
-    // Stack frame size is limited in GOOGLE3.
+#if defined(SK_BUILD_FOR_GOOGLE3)
+    // Stack frame size is limited in SK_BUILD_FOR_GOOGLE3.
     const int kTripleCount = 100;
     const int kMatrixCount = 100;
 #else