Enable unused param checking for public includes.

include/core/SkCanvas.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 SkCanvas_DEFINED
 #define SkCanvas_DEFINED
 
@@ skipping 1060 matching lines @@
                    const SkPoint texCoords[4], SkXfermode* xmode, const SkPaint& paint);
 
     void EXPERIMENTAL_drawDrawable(SkCanvasDrawable*);
 
     /** Send a blob of data to the canvas.
         For canvases that draw, this call is effectively a no-op, as the data
         is not parsed, but just ignored. However, this call exists for
         subclasses like SkPicture's recording canvas, that can store the data
         and then play it back later (via another call to drawData).
      */
-    virtual void drawData(const void* data, size_t length) {
+    virtual void drawData(const void* /*data*/, size_t /*length*/) {
         // do nothing. Subclasses may do something with the data
     }
 
     /** Add comments. beginCommentGroup/endCommentGroup open/close a new group.
         Each comment added via addComment is notionally attached to its
         enclosing group. Top-level comments simply belong to no group.
      */
-    virtual void beginCommentGroup(const char* description) {
+    virtual void beginCommentGroup(const char* /*description*/) {
         // do nothing. Subclasses may do something
     }
-    virtual void addComment(const char* kywd, const char* value) {
+    virtual void addComment(const char* /*kywd*/, const char* /*value*/) {
         // do nothing. Subclasses may do something
     }
     virtual void endCommentGroup() {
         // do nothing. Subclasses may do something
     }
 
     /**
      *  With this call the client asserts that subsequent draw operations (up to the
      *  matching popCull()) are fully contained within the given bounding box. The assertion
      *  is not enforced, but the information might be used to quick-reject command blocks,
@@ skipping 444 matching lines @@
 
 class SkCanvasClipVisitor {
 public:
     virtual ~SkCanvasClipVisitor();
     virtual void clipRect(const SkRect&, SkRegion::Op, bool antialias) = 0;
     virtual void clipRRect(const SkRRect&, SkRegion::Op, bool antialias) = 0;
     virtual void clipPath(const SkPath&, SkRegion::Op, bool antialias) = 0;
 };
 
 #endif