move program descriptor generation to flush

src/gpu/GrGpu.h

Index: src/gpu/GrGpu.h
diff --git a/src/gpu/GrGpu.h b/src/gpu/GrGpu.h
index d0bff30262c59a220af6dcea2ab25f87d89c1e52..884efbe8cbe14e9bf51c852a326b5eaa15028693 100644
--- a/src/gpu/GrGpu.h
+++ b/src/gpu/GrGpu.h
@@ -315,7 +315,6 @@ public:
     GrContext::GPUStats* gpuStats() { return &fGPUStats; }
 
     virtual void buildProgramDesc(const GrOptDrawState&,
-                                  const GrProgramDesc::DescInfo&,
                                   GrGpu::DrawType,
                                   GrProgramDesc*) = 0;
 
@@ -357,14 +356,17 @@ public:
                              const SkIRect& srcRect,
                              const SkIPoint& dstPoint) = 0;
 
-    virtual void draw(const GrOptDrawState&, const GrDrawTarget::DrawInfo&);
+    virtual void draw(const GrOptDrawState&, const GrProgramDesc&, const GrDrawTarget::DrawInfo&);
     virtual void stencilPath(const GrOptDrawState&,
+                             const GrProgramDesc&,
                              const GrPath*,
                              const GrStencilSettings&);
     virtual void drawPath(const GrOptDrawState&,
+                          const GrProgramDesc&,
                           const GrPath*,
                           const GrStencilSettings&);
     virtual void drawPaths(const GrOptDrawState&,
+                           const GrProgramDesc&,
                            const GrPathRange*,
                            const void* indices,
                            GrDrawTarget::PathIndexType,
@@ -469,7 +471,7 @@ private:
     // deltas from previous state at draw time. This function does the
     // backend-specific flush of the state.
     // returns false if current state is unsupported.
-    virtual bool flushGraphicsState(const GrOptDrawState&, DrawType) = 0;
+    virtual bool flushGraphicsState(const GrOptDrawState&, const GrProgramDesc&, DrawType) = 0;
 
     // clears target's entire stencil buffer to 0
     virtual void clearStencil(GrRenderTarget* target) = 0;