Provide an option in bench_pictures to count pixel ram.

gm/factory.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkBitmapFactory.h"
 #include "SkCanvas.h"
@@ skipping 24 matching lines @@
         SkFILEStream stream(filename.c_str());
         if (stream.isValid()) {
             stream.rewind();
             size_t length = stream.getLength();
             void* buffer = sk_malloc_throw(length);
             stream.read(buffer, length);
             SkAutoDataUnref data(SkData::NewFromMalloc(buffer, length));
             SkBitmapFactory factory(&SkImageDecoder::DecodeMemoryToTarget);
             // Create a cache which will boot the pixels out anytime the
             // bitmap is unlocked.
-            SkAutoTUnref<SkLruImageCache> cache(SkNEW_ARGS(SkLruImageCache, (0)));
+            SkAutoTUnref<SkLruImageCache> cache(SkNEW_ARGS(SkLruImageCache, (1)));
             factory.setImageCache(cache);
             factory.installPixelRef(data, &fBitmap);
         }
     }
 
     virtual SkString onShortName() {
         return SkString("factory");
     }
 
     virtual SkISize onISize() {
         return make_isize(640, 480);
     }
 
     virtual void onDraw(SkCanvas* canvas) {
         canvas->drawBitmap(fBitmap, 0, 0);
     }
 
 private:
     SkBitmap fBitmap;
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new FactoryGM; }
 static GMRegistry reg(MyFactory);
 
 }