Move code to dump GrSurface as a png to helper files

src/gpu/GrTextStrike.cpp

Index: src/gpu/GrTextStrike.cpp
diff --git a/src/gpu/GrTextStrike.cpp b/src/gpu/GrTextStrike.cpp
index 81be3418f7ca1d8c71596bdbfb0afb55f16b602e..edc2ff095a5da862e71051afef9de1f011e20f16 100644
--- a/src/gpu/GrTextStrike.cpp
+++ b/src/gpu/GrTextStrike.cpp
@@ -201,6 +201,7 @@ void GrFontCache::dump() const {
     for (int i = 0; i < kAtlasCount; ++i) {
         if (fAtlases[i]) {
             GrTexture* texture = fAtlases[i]->getTexture();
+#if SK_DEVELOPER
             if (texture) {
                 SkString filename;
 #ifdef SK_BUILD_FOR_ANDROID
@@ -208,8 +209,9 @@ void GrFontCache::dump() const {
 #else
                 filename.printf("fontcache_%d%d.png", gDumpCount, i);
 #endif
-                texture->surfacePriv().savePixels(filename.c_str());
+                SkSaveGrSurfacePixelsAsPNG(texture, filename.c_str());
             }
+#endif
         }
     }
     ++gDumpCount;