Fix vertical text scaling on Mac.

samplecode/SampleApp.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 "SampleApp.h"
 
 #include "SkData.h"
 #include "SkCanvas.h"
@@ skipping 1828 matching lines @@
                 return true;
             }
             break;
         case kLeft_SkKey:
             if (this->previousSample()) {
                 return true;
             }
             return true;
         case kUp_SkKey:
             if (USE_ARROWS_FOR_ZOOM) {
-                this->changeZoomLevel(1.f);
+                this->changeZoomLevel(1.f / 32.f);
             } else {
                 fNClip = !fNClip;
                 this->inval(NULL);
                 this->updateTitle();
             }
             return true;
         case kDown_SkKey:
             if (USE_ARROWS_FOR_ZOOM) {
-                this->changeZoomLevel(-1.f);
+                this->changeZoomLevel(-1.f / 32.f);
             } else {
                 this->setConfig(cycle_configs(this->getBitmap().config()));
                 this->updateTitle();
             }
             return true;
         case kOK_SkKey: {
             SkString title;
             if (curr_title(this, &title)) {
                 writeTitleToPrefs(title.c_str());
             }
@@ skipping 586 matching lines @@
     SkGraphics::Init();
     SkEvent::Init();
 }
 
 // FIXME: this should be in a header
 void application_term();
 void application_term() {
     SkEvent::Term();
     SkGraphics::Term();
 }