Add caps overrides to GMs

dm/DMSrcSink.cpp

Index: dm/DMSrcSink.cpp
diff --git a/dm/DMSrcSink.cpp b/dm/DMSrcSink.cpp
index 090a24d86a62590f123881274578b0468e59a01d..20b3e078fd9469ed7a98b2c1aeeb2b520b0cdc86 100644
--- a/dm/DMSrcSink.cpp
+++ b/dm/DMSrcSink.cpp
@@ -57,6 +57,11 @@ Name GMSrc::name() const {
     return gm->getName();
 }
 
+void GMSrc::modifyGrContextOptions(GrContextOptions* options) const {
+    SkAutoTDelete<skiagm::GM> gm(fFactory(NULL));
+    gm->modifyGrContextOptions(options);
+}
+
 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
 
 CodecSrc::CodecSrc(Path path, Mode mode, DstColorType dstColorType)
@@ -340,7 +345,10 @@ int GPUSink::enclave() const {
 void PreAbandonGpuContextErrorHandler(SkError, void*) {}
 
 Error GPUSink::draw(const Src& src, SkBitmap* dst, SkWStream*, SkString* log) const {
-    GrContextFactory factory;
+    GrContextOptions options;
+    src.modifyGrContextOptions(&options);
+
+    GrContextFactory factory(options);
     const SkISize size = src.size();
     const SkImageInfo info =
         SkImageInfo::Make(size.width(), size.height(), kN32_SkColorType, kPremul_SkAlphaType);