Remove unused matrix param from GrContext/GrDrawTarget rect drawing functions.

src/gpu/GrOvalRenderer.cpp

Index: src/gpu/GrOvalRenderer.cpp
diff --git a/src/gpu/GrOvalRenderer.cpp b/src/gpu/GrOvalRenderer.cpp
index cf4c31677d4aed4e4f910a28f54d912803274ff9..395c90be05965b4091f79f3cecd2dd9e073d2e5a 100644
--- a/src/gpu/GrOvalRenderer.cpp
+++ b/src/gpu/GrOvalRenderer.cpp
@@ -939,7 +939,7 @@ bool GrOvalRenderer::drawDRRect(GrDrawTarget* target, GrContext* context, bool u
     if (applyAA) {
         bounds.outset(SK_ScalarHalf, SK_ScalarHalf);
     }
-    target->drawRect(bounds, NULL, NULL, NULL);
+    target->drawRect(bounds, NULL, NULL);
     return true;
 }