Adjust distance field glyph and font atlas sizes to maximize storage.

src/gpu/GrBitmapTextContext.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 "GrBitmapTextContext.h"
 #include "GrAtlas.h"
 #include "GrDefaultGeoProcFactory.h"
@@ skipping 568 matching lines @@
                 }
                 break;
             }
                 // Grayscale/BW text
             case kA8_GrMaskFormat:
                 break;
             default:
                 SkFAIL("Unexpected mask format.");
         }
 
-        GrTextureParams params(SkShader::kRepeat_TileMode, GrTextureParams::kNone_FilterMode);
+        GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kNone_FilterMode);
         uint32_t textureUniqueID = fCurrTexture->getUniqueID();
         if (textureUniqueID != fEffectTextureUniqueID ||
             fCachedGeometryProcessor->color() != color ||
             !fCachedGeometryProcessor->localMatrix().cheapEqualTo(fLocalMatrix)) {
             // This will be ignored in the non A8 case
             bool opaqueVertexColors = GrColorIsOpaque(fPaint.getColor());
             fCachedGeometryProcessor.reset(GrBitmapTextGeoProc::Create(color,
                                                                        fCurrTexture,
                                                                        params,
                                                                        fCurrMaskFormat,
@@ skipping 23 matching lines @@
     }
 }
 
 inline void GrBitmapTextContext::finish() {
     this->flush();
     fTotalVertexCount = 0;
 
     GrTextContext::finish();
 }