Fixes for -Wunused-function on Linux, Android and ChromeOS

ui/gfx/interpolated_transform_unittest.cc

Index: ui/gfx/interpolated_transform_unittest.cc
diff --git a/ui/gfx/interpolated_transform_unittest.cc b/ui/gfx/interpolated_transform_unittest.cc
index acea465d59a6d87ab515644c8be48c19ec22c2d9..5215a8b07fe5589ab1ea578360c48387edf83991 100644
--- a/ui/gfx/interpolated_transform_unittest.cc
+++ b/ui/gfx/interpolated_transform_unittest.cc
@@ -19,16 +19,6 @@ void CheckApproximatelyEqual(const gfx::Transform& lhs,
   }
 }
 
-float NormalizeAngle(float angle) {
-  while (angle < 0.0f) {
-    angle += 360.0f;
-  }
-  while (angle > 360.0f) {
-    angle -= 360.0f;
-  }
-  return angle;
-}
-
 } // namespace
 
 TEST(InterpolatedTransformTest, InterpolatedRotation) {