Revert of Revert "Serialization of SkPictureImageFilter" (https://codereview.chromium.org/153583007/)

Reason for revert:
New SKPs with version20 are in Google Storage due to http://108.170.219.160:10117/builders/Housekeeper-Nightly-RecreateSKPs/builds/22

Original issue's description:
> Revert "Serialization of SkPictureImageFilter"
>
> This reverts commit 227321b30106e57942929eb96fa5bc22544f6c9e.
>
> Revert "Sanitizing source files in Housekeeper-Nightly"
>
> This reverts commit baf28584b7636c01355f8d8d972e06aa7fb66d77.
>
> TBR=robertphillips@google.com,sugoi@google.com
>
> Committed: https://code.google.com/p/skia/source/detail?r=13356

R=robertphillips@google.com, sugoi@google.com, fmalita@google.com, fmalita@chromium.org
TBR=fmalita@chromium.org, fmalita@google.com, robertphillips@google.com, sugoi@google.com
NOTREECHECKS=true
NOTRY=true

Author: rmistry@google.com

Review URL: https://codereview.chromium.org/143163005

git-svn-id: http://skia.googlecode.com/svn/trunk@13357 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/SurfaceTest.cpp b/tests/SurfaceTest.cpp
index 179a33c..8075913 100644
--- a/tests/SurfaceTest.cpp
+++ b/tests/SurfaceTest.cpp
@@ -60,7 +60,7 @@
     size_t size = info.getSafeSize(rowBytes);
     void* addr = sk_malloc_throw(size);
     SkData* data = SkData::NewFromMalloc(addr, size);
-    
+
     REPORTER_ASSERT(reporter, 1 == data->getRefCnt());
     SkImage* image = SkImage::NewRasterData(info, data, rowBytes);
     REPORTER_ASSERT(reporter, 2 == data->getRefCnt());
@@ -124,7 +124,7 @@
     for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); ++i) {
         SkImageInfo info;
         size_t rowBytes;
-        
+
         SkAutoTUnref<SkImage> image(createImage(gRec[i].fType, NULL, color));
         if (!image.get()) {
             continue;   // gpu may not be enabled