Don't draw if SkShader::asNewFragmentProcessor fails.

src/gpu/GrTextContext.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTextContext.h"
 #include "GrContext.h"
 #include "GrDrawTarget.h"
@@ skipping 98 matching lines @@
 
         if (drawFilter && !drawFilter->filter(&runPaint, SkDrawFilter::kText_Type)) {
             // A false return from filter() means we should abort the current draw.
             runPaint = skPaint;
             continue;
         }
 
         runPaint.setFlags(fGpuDevice->filterTextFlags(runPaint));
 
         GrPaint grPaint;
-        SkPaint2GrPaintShader(fContext, fRenderTarget, runPaint, viewMatrix, true, &grPaint);
+        if (!SkPaint2GrPaint(fContext, fRenderTarget, runPaint, viewMatrix, true, &grPaint)) {
+            return;
+        }
 
         switch (it.positioning()) {
         case SkTextBlob::kDefault_Positioning:
             this->drawText(rt, clip, grPaint, runPaint, viewMatrix, (const char *)it.glyphs(),
                            textLen, x + offset.x(), y + offset.y(), clipBounds);
             break;
         case SkTextBlob::kHorizontal_Positioning:
             this->drawPosText(rt, clip, grPaint, runPaint, viewMatrix, (const char*)it.glyphs(),
                               textLen, it.pos(), 1, SkPoint::Make(x, y + offset.y()), clipBounds);
             break;
@@ skipping 117 matching lines @@
     if (cache->getAuxProcData(GlyphCacheAuxProc, &auxData)) {
         scaler = (GrFontScaler*)auxData;
     }
     if (NULL == scaler) {
         scaler = SkNEW_ARGS(GrFontScaler, (cache));
         cache->setAuxProc(GlyphCacheAuxProc, scaler);
     }
 
     return scaler;
 }