Fix for chrome fuzzer

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 139 matching lines @@
     } else {
         halfSampleX = halfSampleY = SK_FixedHalf;
     }
 
     SkFixed fx = SkScalarToFixed(x) + halfSampleX;
     SkFixed fy = SkScalarToFixed(y) + halfSampleY;
 
     // if we have RGB, then we won't have any SkShaders so no need to use a localmatrix, but for
     // performance reasons we just invert here instead
     if (!viewMatrix.invert(&fLocalMatrix)) {
-            SkDebugf("Cannot invert viewmatrix\n");
+        SkDebugf("Cannot invert viewmatrix\n");
+        return;
     }
 
     while (text < stop) {
         const SkGlyph& glyph = glyphCacheProc(cache, &text, fx & fxMask, fy & fyMask);
 
         fx += autokern.adjust(glyph);
 
         if (glyph.fWidth) {
             this->appendGlyph(GrGlyph::Pack(glyph.getGlyphID(),
                                             glyph.getSubXFixed(),
@@ skipping 27 matching lines @@
 
     SkDrawCacheProc glyphCacheProc = fSkPaint.getDrawCacheProc();
 
     SkAutoGlyphCache    autoCache(fSkPaint, &fDeviceProperties, &viewMatrix);
     SkGlyphCache*       cache = autoCache.getCache();
     GrFontScaler*       fontScaler = GetGrFontScaler(cache);
 
     // if we have RGB, then we won't have any SkShaders so no need to use a localmatrix, but for
     // performance reasons we just invert here instead
     if (!viewMatrix.invert(&fLocalMatrix)) {
-            SkDebugf("Cannot invert viewmatrix\n");
+        SkDebugf("Cannot invert viewmatrix\n");
+        return;
     }
 
     int numGlyphs = fSkPaint.textToGlyphs(text, byteLength, NULL);
     fTotalVertexCount = kVerticesPerGlyph*numGlyphs;
 
     const char*        stop = text + byteLength;
     SkTextAlignProc    alignProc(fSkPaint.getTextAlign());
     SkTextMapStateProc tmsProc(viewMatrix, offset, scalarsPerPosition);
     SkFixed halfSampleX = 0, halfSampleY = 0;
 
@@ skipping 392 matching lines @@
     }
 }
 
 inline void GrBitmapTextContext::finish() {
     this->flush();
     fTotalVertexCount = 0;
 
     GrTextContext::finish();
 }