Revert of small cleanup of GrAtlas

src/gpu/GrDrawTarget.h

Index: src/gpu/GrDrawTarget.h
diff --git a/src/gpu/GrDrawTarget.h b/src/gpu/GrDrawTarget.h
index 73a4ec770fc8394fb6188c3381904545e08a35eb..84f7eb2197a4aa736aabba9847b9ba5b08ab5518 100644
--- a/src/gpu/GrDrawTarget.h
+++ b/src/gpu/GrDrawTarget.h
@@ -201,6 +201,23 @@
      * is intended to give an application some recourse when resources are low.
      */
     virtual void purgeResources() {};
+
+    ///////////////////////////////////////////////////////////////////////////
+    // Draw execution tracking (for font atlases and other resources)
+    class DrawToken {
+    public:
+        DrawToken(GrDrawTarget* drawTarget, uint32_t drawID) :
+                  fDrawTarget(drawTarget), fDrawID(drawID) {}
+
+        bool isIssued() { return fDrawTarget && fDrawTarget->isIssued(fDrawID); }
+
+    private:
+        GrDrawTarget*  fDrawTarget;
+        uint32_t       fDrawID;   // this may wrap, but we're doing direct comparison
+                                  // so that should be okay
+    };
+
+    virtual DrawToken getCurrentDrawToken() { return DrawToken(this, 0); }
 
     bool programUnitTest(int maxStages);