Enable unused param checking for public includes.

include/core/SkShader.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkShader_DEFINED
 #define SkShader_DEFINED
@@ skipping 348 matching lines @@
      *
      *  These are bare pointers; the ownership and reference count are unchanged.
      */
 
     struct ComposeRec {
         const SkShader*     fShaderA;
         const SkShader*     fShaderB;
         const SkXfermode*   fMode;
     };
 
-    virtual bool asACompose(ComposeRec* rec) const { return false; }
+    virtual bool asACompose(ComposeRec*) const { return false; }
 
 
     /**
      *  Returns true if the shader subclass succeeds in creating an effect or if none is required.
      *  False is returned if it fails or if there is not an implementation of this method in the
      *  shader subclass.
      *
      *  On success an implementation of this method must inspect the SkPaint and set paintColor to
      *  the color the effect expects as its input color. If the SkShader wishes to emit a solid
      *  color then it should set paintColor to that color and not create an effect. Note that
@@ skipping 120 matching lines @@
     // constructors.
     SkMatrix fLocalMatrix;
 
     // So the SkLocalMatrixShader can whack fLocalMatrix in its SkReadBuffer constructor.
     friend class SkLocalMatrixShader;
 
     typedef SkFlattenable INHERITED;
 };
 
 #endif