Revise attribute binding interface

src/gpu/GrTextContext.cpp

Index: src/gpu/GrTextContext.cpp
===================================================================
--- src/gpu/GrTextContext.cpp	(revision 8462)
+++ src/gpu/GrTextContext.cpp	(working copy)
@@ -194,10 +194,9 @@
     if (NULL == fVertices) {
         // position + texture coord
         static const GrVertexAttrib kVertexAttribs[] = {
-            {kVec2f_GrVertexAttribType, 0},
-            {kVec2f_GrVertexAttribType, sizeof(GrPoint)}
+            {kVec2f_GrVertexAttribType, 0,               kPosition_GrVertexAttribBinding},
+            {kVec2f_GrVertexAttribType, sizeof(GrPoint), kEffect_GrVertexAttribBinding}
         };
-        static const GrAttribBindings kAttribBindings = 0;
 
        // If we need to reserve vertices allow the draw target to suggest
         // a number of verts to reserve and whether to perform a flush.
@@ -215,8 +214,6 @@
             fDrawTarget = fContext->getTextTarget(fPaint);
             fDrawTarget->drawState()->setVertexAttribs(kVertexAttribs, SK_ARRAY_COUNT(kVertexAttribs));
         }
-        fDrawTarget->drawState()->setAttribIndex(GrDrawState::kPosition_AttribIndex, 0);
-        fDrawTarget->drawState()->setAttribBindings(kAttribBindings);
         fMaxVertices = kDefaultRequestedVerts;
         // ignore return, no point in flushing again.
         fDrawTarget->geometryHints(&fMaxVertices, NULL);