skia: Add runtime option to disable picture IO security precautions

tests/ImageFilterTest.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 "SkBitmap.h"
 #include "SkBitmapDevice.h"
 #include "SkBitmapSource.h"
@@ skipping 841 matching lines @@
 
     redPaintWithFilter.setImageFilter(unflattenedFilter);
     SkPictureRecorder crossProcessRecorder;
     SkCanvas* crossProcessCanvas = crossProcessRecorder.beginRecording(1, 1, &factory, 0);
     crossProcessCanvas->drawRect(SkRect::Make(SkIRect::MakeWH(1, 1)), redPaintWithFilter);
     SkAutoTUnref<SkPicture> crossProcessPicture(crossProcessRecorder.endRecording());
 
     canvas.clear(0x0);
     canvas.drawPicture(crossProcessPicture);
     pixel = *bitmap.getAddr32(0, 0);
-#ifdef SK_DISALLOW_CROSSPROCESS_PICTUREIMAGEFILTERS
-    // The result here should not be green, since the filter draws nothing.
-    REPORTER_ASSERT(reporter, pixel != SK_ColorGREEN);
-#else
-    REPORTER_ASSERT(reporter, pixel == SK_ColorGREEN);
-#endif
+    // If the security precautions are enabled, the result here should not be green, since the
+    // filter draws nothing.
+    REPORTER_ASSERT(reporter, SkPicture::PictureIOSecurityPrecautionsEnabled() 
+        ? pixel != SK_ColorGREEN : pixel == SK_ColorGREEN);
 }
 
 DEF_TEST(ImageFilterClippedPictureImageFilter, reporter) {
     SkRTreeFactory factory;
     SkPictureRecorder recorder;
     SkCanvas* recordingCanvas = recorder.beginRecording(1, 1, &factory, 0);
 
     // Create an SkPicture which simply draws a green 1x1 rectangle.
     SkPaint greenPaint;
     greenPaint.setColor(SK_ColorGREEN);
@@ skipping 313 matching lines @@
         return;
     }
     SkAutoTUnref<SkGpuDevice> device(SkGpuDevice::Create(context,
                                                          SkSurface::kNo_Budgeted,
                                                          SkImageInfo::MakeN32Premul(1, 1),
                                                          0,
                                                          &gProps));
     test_negative_blur_sigma(device, reporter);
 }
 #endif