always use 64 bit long for fixed mul

src/gpu/GrDistanceFieldTextContext.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrDistanceFieldTextContext.h"
 #include "GrAtlas.h"
 #include "SkColorFilter.h"
@@ skipping 483 matching lines @@
 
         if (glyph.fWidth) {
             this->drawPackedGlyph(GrGlyph::Pack(glyph.getGlyphID(),
                                                 glyph.getSubXFixed(),
                                                 glyph.getSubYFixed()),
                                   fx,
                                   fy,
                                   fontScaler);
         }
 
-        fx += SkFixedMul_portable(glyph.fAdvanceX, fixedScale);
-        fy += SkFixedMul_portable(glyph.fAdvanceY, fixedScale);
+        fx += SkFixedMul_longlong(glyph.fAdvanceX, fixedScale);
+        fy += SkFixedMul_longlong(glyph.fAdvanceY, fixedScale);
     }
 
     this->finish();
 }
 
 void GrDistanceFieldTextContext::drawPosText(const GrPaint& paint, const SkPaint& skPaint,
                                              const char text[], size_t byteLength,
                                              const SkScalar pos[], SkScalar constY,
                                              int scalarsPerPosition) {
 
@@ skipping 51 matching lines @@
                                       SkScalarToFixed(x) - (glyph.fAdvanceX >> alignShift),
                                       SkScalarToFixed(y) - (glyph.fAdvanceY >> alignShift),
                                       fontScaler);
             }
             pos += scalarsPerPosition;
         }
     }
 
     this->finish();
 }