disable linear pipeline for now (so bots don't crash)

src/core/SkBitmapProcShader.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapProcShader.h"
 #include "SkBitmapProcState.h"
 #include "SkBitmapProvider.h"
@@ skipping 208 matching lines @@
     if (SkShader::kMirror_TileMode == tmx || SkShader::kMirror_TileMode == tmy) {
         useLinearPipeline = false;
     }
 
     // New code doesn't support Mirror (YET), so we detect that here.
     //
     if (totalInverse.hasPerspective()) {
         useLinearPipeline = false;
     }
 
+    //
+    // For now, only enable locally since we are hitting some crashers on the test bots
+    //
+    useLinearPipeline = false;
+
     if (useLinearPipeline) {
         void* infoStorage = (char*)storage + sizeof(LinearPipelineContext);
         SkBitmapProcInfo* info = new (infoStorage) SkBitmapProcInfo(provider, tmx, tmy);
         if (!info->init(totalInverse, *rec.fPaint)) {
             info->~SkBitmapProcInfo();
             return nullptr;
         }
         return new (storage) LinearPipelineContext(shader, rec, info);
     } else {
         void* stateStorage = (char*)storage + sizeof(BitmapProcShaderContext);
@@ skipping 214 matching lines @@
         inner.reset(GrSimpleTextureEffect::Create(texture, matrix, params));
     }
 
     if (kAlpha_8_SkColorType == fRawBitmap.colorType()) {
         return GrFragmentProcessor::MulOutputByInputUnpremulColor(inner);
     }
     return GrFragmentProcessor::MulOutputByInputAlpha(inner);
 }
 
 #endif