Register SkLocalMatrixImageFilter for serialization.

This fixes one of the zillions of serialize-8888 backlisted tests.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1868453003

Review URL: https://codereview.chromium.org/1868453003
diff --git a/src/ports/SkGlobalInitialization_default.cpp b/src/ports/SkGlobalInitialization_default.cpp
index ed0f474..ea268f2 100644
--- a/src/ports/SkGlobalInitialization_default.cpp
+++ b/src/ports/SkGlobalInitialization_default.cpp
@@ -30,6 +30,7 @@
 #include "SkLayerRasterizer.h"
 #include "SkLightingImageFilter.h"
 #include "SkLightingShader.h"
+#include "SkLocalMatrixImageFilter.h"
 #include "SkLumaColorFilter.h"
 #include "SkMagnifierImageFilter.h"
 #include "SkMatrixConvolutionImageFilter.h"
@@ -105,6 +106,7 @@
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkDropShadowImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkErodeImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkImageSource)
+    SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkLocalMatrixImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkPaintImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkPictureImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkTileImageFilter)
diff --git a/tools/dm_flags.json b/tools/dm_flags.json
index c842db7..4407d27 100644
--- a/tools/dm_flags.json
+++ b/tools/dm_flags.json
@@ -141,10 +141,6 @@
     "serialize-8888", 
     "gm", 
     "_", 
-    "localmatriximagefilter", 
-    "serialize-8888", 
-    "gm", 
-    "_", 
     "path_stroke_with_zero_length", 
     "serialize-8888", 
     "gm", 
@@ -357,10 +353,6 @@
     "serialize-8888", 
     "gm", 
     "_", 
-    "localmatriximagefilter", 
-    "serialize-8888", 
-    "gm", 
-    "_", 
     "path_stroke_with_zero_length", 
     "serialize-8888", 
     "gm", 
@@ -670,10 +662,6 @@
     "serialize-8888", 
     "gm", 
     "_", 
-    "localmatriximagefilter", 
-    "serialize-8888", 
-    "gm", 
-    "_", 
     "path_stroke_with_zero_length", 
     "serialize-8888", 
     "gm", 
@@ -981,10 +969,6 @@
     "serialize-8888", 
     "gm", 
     "_", 
-    "localmatriximagefilter", 
-    "serialize-8888", 
-    "gm", 
-    "_", 
     "path_stroke_with_zero_length", 
     "serialize-8888", 
     "gm", 
@@ -1295,10 +1279,6 @@
     "serialize-8888", 
     "gm", 
     "_", 
-    "localmatriximagefilter", 
-    "serialize-8888", 
-    "gm", 
-    "_", 
     "path_stroke_with_zero_length", 
     "serialize-8888", 
     "gm", 
@@ -1602,10 +1582,6 @@
     "serialize-8888", 
     "gm", 
     "_", 
-    "localmatriximagefilter", 
-    "serialize-8888", 
-    "gm", 
-    "_", 
     "path_stroke_with_zero_length", 
     "serialize-8888", 
     "gm", 
@@ -1911,10 +1887,6 @@
     "serialize-8888", 
     "gm", 
     "_", 
-    "localmatriximagefilter", 
-    "serialize-8888", 
-    "gm", 
-    "_", 
     "path_stroke_with_zero_length", 
     "serialize-8888", 
     "gm", 
@@ -2216,10 +2188,6 @@
     "serialize-8888", 
     "gm", 
     "_", 
-    "localmatriximagefilter", 
-    "serialize-8888", 
-    "gm", 
-    "_", 
     "path_stroke_with_zero_length", 
     "serialize-8888", 
     "gm", 
@@ -2468,10 +2436,6 @@
     "serialize-8888", 
     "gm", 
     "_", 
-    "localmatriximagefilter", 
-    "serialize-8888", 
-    "gm", 
-    "_", 
     "path_stroke_with_zero_length", 
     "serialize-8888", 
     "gm", 
@@ -2813,10 +2777,6 @@
     "serialize-8888", 
     "gm", 
     "_", 
-    "localmatriximagefilter", 
-    "serialize-8888", 
-    "gm", 
-    "_", 
     "path_stroke_with_zero_length", 
     "serialize-8888", 
     "gm", 
@@ -3034,10 +2994,6 @@
     "serialize-8888", 
     "gm", 
     "_", 
-    "localmatriximagefilter", 
-    "serialize-8888", 
-    "gm", 
-    "_", 
     "path_stroke_with_zero_length", 
     "serialize-8888", 
     "gm", 
@@ -3258,10 +3214,6 @@
     "serialize-8888", 
     "gm", 
     "_", 
-    "localmatriximagefilter", 
-    "serialize-8888", 
-    "gm", 
-    "_", 
     "path_stroke_with_zero_length", 
     "serialize-8888", 
     "gm", 
@@ -3499,10 +3451,6 @@
     "serialize-8888", 
     "gm", 
     "_", 
-    "localmatriximagefilter", 
-    "serialize-8888", 
-    "gm", 
-    "_", 
     "path_stroke_with_zero_length", 
     "serialize-8888", 
     "gm", 
@@ -3739,10 +3687,6 @@
     "serialize-8888", 
     "gm", 
     "_", 
-    "localmatriximagefilter", 
-    "serialize-8888", 
-    "gm", 
-    "_", 
     "path_stroke_with_zero_length", 
     "serialize-8888", 
     "gm", 
@@ -4105,10 +4049,6 @@
     "serialize-8888", 
     "gm", 
     "_", 
-    "localmatriximagefilter", 
-    "serialize-8888", 
-    "gm", 
-    "_", 
     "path_stroke_with_zero_length", 
     "serialize-8888", 
     "gm", 
diff --git a/tools/dm_flags.py b/tools/dm_flags.py
index 1973986..121f7c7 100755
--- a/tools/dm_flags.py
+++ b/tools/dm_flags.py
@@ -75,7 +75,7 @@
   if 'TegraX1' in bot:
     configs = [x.replace('gpu', 'gl') for x in configs]
     configs = [x.replace('msaa', 'glmsaa') for x in configs]
-    
+
   # NP is running out of RAM when we run all these modes.  skia:3255
   if 'NexusPlayer' not in bot:
     configs.extend(mode + '-8888' for mode in
@@ -169,7 +169,6 @@
                'fontmgr_match',
                'fontmgr_iter',
                'lightingshader',
-               'localmatriximagefilter',
                'path_stroke_with_zero_length',
                'textblobgeometrychange',
                'verylargebitmap',              # Windows only.