remove dead SK_DISABLE_DASHING_OPTIMIZATION flag

src/core/SkDraw.cpp

 /*
  * 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.
  */
 
 #include "SkDraw.h"
 #include "SkBlitter.h"
 #include "SkCanvas.h"
@@ skipping 610 matching lines @@
                         if (fDevice) {
                             fDevice->drawRect(*this, r, newPaint);
                         } else {
                             this->drawRect(r, newPaint);
                         }
                     }
                 }
                 break;
             }
             case SkCanvas::kLines_PointMode:
-#ifndef SK_DISABLE_DASHING_OPTIMIZATION
                 if (2 == count && paint.getPathEffect()) {
                     // most likely a dashed line - see if it is one of the ones
                     // we can accelerate
                     SkStrokeRec rec(paint);
                     SkPathEffect::PointData pointData;
 
                     SkPath path;
                     path.moveTo(pts[0]);
                     path.lineTo(pts[1]);
 
@@ skipping 63 matching lines @@
                                     fDevice->drawRect(*this, r, newP);
                                 } else {
                                     this->drawRect(r, newP);
                                 }
                             }
                         }
 
                         break;
                     }
                 }
-#endif // DISABLE_DASHING_OPTIMIZATION
                 // couldn't take fast path so fall through!
             case SkCanvas::kPolygon_PointMode: {
                 count -= 1;
                 SkPath path;
                 SkPaint p(paint);
                 p.setStyle(SkPaint::kStroke_Style);
                 size_t inc = (SkCanvas::kLines_PointMode == mode) ? 2 : 1;
                 path.setIsVolatile(true);
                 for (size_t i = 0; i < count; i += inc) {
                     path.moveTo(pts[i]);
@@ skipping 1654 matching lines @@
         mask->fImage = SkMask::AllocImage(size);
         memset(mask->fImage, 0, mask->computeImageSize());
     }
 
     if (SkMask::kJustComputeBounds_CreateMode != mode) {
         draw_into_mask(*mask, devPath, style);
     }
 
     return true;
 }