Add support for GL 565 and 4444 configs to test tools

Change-Id: I395e3387df44cf5370fef6ab73db73228225622f
Reviewed-on: https://skia-review.googlesource.com/23946
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
diff --git a/dm/DMSrcSink.h b/dm/DMSrcSink.h
index 553eac0..f2e4ac2 100644
--- a/dm/DMSrcSink.h
+++ b/dm/DMSrcSink.h
@@ -305,8 +305,8 @@
 class GPUSink : public Sink {
 public:
     GPUSink(sk_gpu_test::GrContextFactory::ContextType,
-            sk_gpu_test::GrContextFactory::ContextOverrides,
-            int samples, bool diText, SkColorType colorType, sk_sp<SkColorSpace> colorSpace,
+            sk_gpu_test::GrContextFactory::ContextOverrides, int samples, bool diText,
+            SkColorType colorType, SkAlphaType alphaType, sk_sp<SkColorSpace> colorSpace,
             bool threaded);
 
     Error draw(const Src&, SkBitmap*, SkWStream*, SkString*) const override;
@@ -323,6 +323,7 @@
     int                                               fSampleCount;
     bool                                              fUseDIText;
     SkColorType                                       fColorType;
+    SkAlphaType                                       fAlphaType;
     sk_sp<SkColorSpace>                               fColorSpace;
     bool                                              fThreaded;
 };