Fix image filters for PDF backend.

src/core/SkCanvas.cpp

 /*
  * Copyright 2008 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCanvas.h"
 #include "SkCanvasPriv.h"
 #include "SkBitmapDevice.h"
@@ skipping 915 matching lines @@
     }
 
     bool isOpaque = !SkToBool(flags & kHasAlphaLayer_SaveFlag);
     SkImageInfo info = SkImageInfo::MakeN32(ir.width(), ir.height(),
                         isOpaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType);
 
     SkBaseDevice* device;
     if (paint && paint->getImageFilter()) {
         device = this->getDevice();
         if (device) {
-            device = device->createCompatibleDevice(info);
+            device = device->createCompatibleDeviceForImageFilter(info);
         }
     } else {
         device = this->createLayerDevice(info);
     }
     if (NULL == device) {
         SkDebugf("Unable to create device for layer.");
         return count;
     }
     this->setupDevice(device);
 
@@ skipping 1603 matching lines @@
     }
 
     if (matrix) {
         canvas->concat(*matrix);
     }
 }
 
 SkAutoCanvasMatrixPaint::~SkAutoCanvasMatrixPaint() {
     fCanvas->restoreToCount(fSaveCount);
 }