Create an optimized draw state but not hooked in yet to gpu pipeline

src/gpu/GrRODrawState.h

Index: src/gpu/GrRODrawState.h
diff --git a/src/gpu/GrRODrawState.h b/src/gpu/GrRODrawState.h
index f4821fc80cd2c3891ddcc906e6143bf7297b1880..a10931efc9b407561edd867dea86c3a066279e33 100644
--- a/src/gpu/GrRODrawState.h
+++ b/src/gpu/GrRODrawState.h
@@ -12,6 +12,7 @@
 #include "GrEffectStage.h"
 #include "SkMatrix.h"
 
+class GrDrawState;
 class GrDrawTargetCaps;
 class GrPaint;
 class GrRenderTarget;
@@ -26,6 +27,10 @@ class GrRODrawState : public SkRefCnt {
 public:
     SK_DECLARE_INST_COUNT(GrRODrawState)
 
+    GrRODrawState() {}
+
+    GrRODrawState& operator= (const GrRODrawState& that);
+
     ///////////////////////////////////////////////////////////////////////////
     /// @name Vertex Attributes
     ////
@@ -68,6 +73,10 @@ public:
         return -1 != fFixedFunctionVertexAttribIndices[kCoverage_GrVertexAttribBinding];
     }
 
+    const int* getFixedFunctionVertexAttribIndices() const {
+        return fFixedFunctionVertexAttribIndices;
+    }
+
     bool validateVertexAttribs() const;
 
     /// @}
@@ -295,6 +304,8 @@ public:
         kLastPublicStateBit = kDummyStateBit-1,
     };
 
+    uint32_t getFlagBits() const { return fFlagBits; }
+
     bool isStateFlagEnabled(uint32_t stateBit) const { return 0 != (stateBit & fFlagBits); }
 
     bool isDitherState() const { return 0 != (fFlagBits & kDither_StateBit); }
@@ -340,9 +351,11 @@ public:
         kB_CombinedState,
     };
 
-    GrRODrawState& operator= (const GrRODrawState& that);
-
 protected:
+    explicit GrRODrawState(const GrRODrawState& drawState) : INHERITED() {
+        fRenderTarget.reset(SkSafeRef(drawState.fRenderTarget.get()));
+    }
+
     bool isEqual(const GrRODrawState& that) const;
 
     // These fields are roughly sorted by decreasing likelihood of being different in op==