Make max number of vertex attributes be checked dynamically

src/gpu/GrGpu.h

Index: src/gpu/GrGpu.h
diff --git a/src/gpu/GrGpu.h b/src/gpu/GrGpu.h
index 161ca5c35d42f0713d62a2aa66c0466bac99890f..bffaa804e1d156a1492320299815466676c3d723 100644
--- a/src/gpu/GrGpu.h
+++ b/src/gpu/GrGpu.h
@@ -381,7 +381,7 @@ public:
     // We pass in an array of meshCount GrMesh to the draw. The backend should loop over each
     // GrMesh object and emit a draw for it. Each draw will use the same GrPipeline and
     // GrPrimitiveProcessor.

[robertphillips, 2016/03/23 16:38:16]

// A false return value means ...

?

[bsalomon, 2016/03/23 16:59:53]

I added a somewhat generic comment since I imagine the set of limits checked
could easily expand.

-    void draw(const GrPipeline&,
+    bool draw(const GrPipeline&,
               const GrPrimitiveProcessor&,
               const GrMesh*,
               int meshCount);