Add a GL cap for instanced rendering to floating point

src/gpu/gl/GrGLCaps.h

Index: src/gpu/gl/GrGLCaps.h
diff --git a/src/gpu/gl/GrGLCaps.h b/src/gpu/gl/GrGLCaps.h
index 0cb353aa9f78703654d17c3731027054b5e36a5a..1ccdf3e79c020d2373aa264d3d67903403576214 100644
--- a/src/gpu/gl/GrGLCaps.h
+++ b/src/gpu/gl/GrGLCaps.h
@@ -307,6 +307,9 @@ public:
     /// Are the baseInstance fields supported in indirect draw commands?
     bool baseInstanceSupport() const { return fBaseInstanceSupport; }
 
+    /// Does the platform have known issuses rendering to floating point when using glDraw*Indirect?
+    bool canDrawIndirectToFloat() const { return fCanDrawIndirectToFloat; }
+
     /// Use indices or vertices in CPU arrays rather than VBOs for dynamic content.
     bool useNonVBOVertexAndIndexDynamicData() const { return fUseNonVBOVertexAndIndexDynamicData; }
 
@@ -398,6 +401,7 @@ private:
     bool fDrawIndirectSupport : 1;
     bool fMultiDrawIndirectSupport : 1;
     bool fBaseInstanceSupport : 1;
+    bool fCanDrawIndirectToFloat : 1;
     bool fUseNonVBOVertexAndIndexDynamicData : 1;
     bool fIsCoreProfile : 1;
     bool fBindFragDataLocationSupport : 1;