SkSize can be aggregate-initialized

Previosly, SkSize had a base class, which prevented it.

Also removes unused SkISize::clampNegToZero() and
SkSize::clampNegToZero().

Change-Id: I7b93b42f6f6381c66e294bbedee99ad53c6c3436
Reviewed-on: https://skia-review.googlesource.com/13187
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
diff --git a/bench/PathBench.cpp b/bench/PathBench.cpp
index 3a1410a..6991db5 100644
--- a/bench/PathBench.cpp
+++ b/bench/PathBench.cpp
@@ -1115,8 +1115,8 @@
 
 
 const SkRect ConservativelyContainsBench::kBounds = SkRect::MakeWH(SkIntToScalar(100), SkIntToScalar(100));
-const SkSize ConservativelyContainsBench::kQueryMin = SkSize::Make(SkIntToScalar(1), SkIntToScalar(1));
-const SkSize ConservativelyContainsBench::kQueryMax = SkSize::Make(SkIntToScalar(40), SkIntToScalar(40));
+const SkSize ConservativelyContainsBench::kQueryMin = {SkIntToScalar(1), SkIntToScalar(1)};
+const SkSize ConservativelyContainsBench::kQueryMax = {SkIntToScalar(40), SkIntToScalar(40)};
 const SkRect ConservativelyContainsBench::kBaseRect = SkRect::MakeXYWH(SkIntToScalar(25), SkIntToScalar(25), SkIntToScalar(50), SkIntToScalar(50));
 const SkScalar ConservativelyContainsBench::kRRRadii[2] = {SkIntToScalar(5), SkIntToScalar(10)};