Initial CL to create Reorder command builder behind a flag

src/gpu/GrCommandBuilder.h

Index: src/gpu/GrCommandBuilder.h
diff --git a/src/gpu/GrCommandBuilder.h b/src/gpu/GrCommandBuilder.h
index eb51b5b7216400481d5646e554f36ce84a1474c6..90099ee2ef973f0dd73b1682842784f65e1f305e 100644
--- a/src/gpu/GrCommandBuilder.h
+++ b/src/gpu/GrCommandBuilder.h
@@ -17,7 +17,7 @@ public:
     typedef GrTargetCommands::Cmd Cmd;
     typedef GrTargetCommands::State State;
 
-    GrCommandBuilder(GrGpu* gpu) : fCommands(gpu) { }
+    static GrCommandBuilder* Create(GrGpu* gpu, bool reorder);
 
     virtual ~GrCommandBuilder() {}
 
@@ -69,6 +69,8 @@ protected:
     typedef GrTargetCommands::CopySurface CopySurface;
     typedef GrTargetCommands::XferBarrier XferBarrier;
 
+    GrCommandBuilder(GrGpu* gpu) : fCommands(gpu) {}
+
     GrTargetCommands::CmdBuffer* cmdBuffer() { return fCommands.cmdBuffer(); }
     GrBatchTarget* batchTarget() { return fCommands.batchTarget(); }