Link webp in skimage and debugger.

tools/skimage_main.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmap.h"
 #include "SkCommandLineFlags.h"
 #include "SkGraphics.h"
@@ skipping 146 matching lines @@
 }
 
 void forceLinking();
 
 void forceLinking() {
     // This function leaks, but that is okay because it is not intended
     // to be called. It is only here so that the linker will include the
     // decoders.
     SkDEBUGCODE(SkImageDecoder *creator = ) CreateJPEGImageDecoder();
     SkASSERT(creator);
+    SkDEBUGCODE(creator = ) CreateWEBPImageDecoder();
+    SkASSERT(creator);
 #ifdef SK_BUILD_FOR_UNIX
     SkDEBUGCODE(creator = ) CreateGIFImageDecoder();
     SkASSERT(creator);
 #endif
 }
 
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif