kNumWindows is only used in GPU builds

gm/windowrectangles.cpp

 /*
  * Copyright 2016 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 "SkClipStack.h"
 #include "SkRRect.h"
 
 #if SK_SUPPORT_GPU
 #  include "GrAppliedClip.h"
 #  include "GrDrawContext.h"
 #  include "GrDrawContextPriv.h"
 #  include "GrFixedClip.h"
 #  include "GrReducedClip.h"
 #  include "GrRenderTargetPriv.h"
 #  include "GrResourceProvider.h"
 #  include "effects/GrTextureDomain.h"
 #endif
 
 constexpr static SkIRect kDeviceRect = {0, 0, 600, 600};
 constexpr static SkIRect kLayerRect = {25, 25, 575, 575};
 constexpr static SkIRect kCoverRect = {50, 50, 550, 550};
-constexpr static int kNumWindows = 8;
 
 namespace skiagm {
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 class WindowRectanglesBaseGM : public GM {
 protected:
     virtual void onCoverClipStack(const SkClipStack&, SkCanvas*) = 0;
 
 private:
@@ skipping 63 matching lines @@
 
     canvas->drawRect(SkRect::Make(kCoverRect), paint);
 }
 
 DEF_GM( return new WindowRectanglesGM(); )
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 #if SK_SUPPORT_GPU
 
+constexpr static int kNumWindows = 8;
+
 /**
  * Visualizes the mask (alpha or stencil) for a clip with several window rectangles. The purpose of
  * this test is to verify that window rectangles are being used during clip mask generation, and to
  * visualize where the window rectangles are placed.
  *
  * We use window rectangles when generating the clip mask because there is no need to invest time
  * defining those regions where window rectangles will be in effect during the actual draw anyway.
  *
  * This test works by filling the entire clip mask with a small checkerboard pattern before drawing
  * it, and then covering the mask with a solid color once it has been generated. The regions inside
@@ skipping 175 matching lines @@
     canvas->clear(SK_ColorWHITE);
     canvas->drawText(errorMsg.c_str(), errorMsg.size(), SkIntToScalar(kCoverRect.centerX()),
                      SkIntToScalar(kCoverRect.centerY() - 10), paint);
 }
 
 DEF_GM( return new WindowRectanglesMaskGM(); )
 
 #endif
 
 }