Revert of make gm background colors 565 compatible (patchset #2 id:20001 of https://codereview.chromium.org/1176243006/)

Reason for revert:
breaks many bots with refcnt error

Original issue's description:
> make gm background colors 565 compatible
>
> Change a batch of GM tests to convert their background color
> so that it is representable in 8888 and 565.
>
> Enable portable text in those same tests to minimize platform
> differences.
>
> In a couple of bitmap tests, use portable typefaces instead of
> choosing 'Times' which may or may not be available on the platform.
>
> R=borenet@google.com
>
> Committed: https://skia.googlesource.com/skia/+/be7f768a357aefb39c42d24b81b24d647bb6ab70

TBR=borenet@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1184123002
diff --git a/gm/bitmapfilters.cpp b/gm/bitmapfilters.cpp
index 11f93c9..22a297d 100644
--- a/gm/bitmapfilters.cpp
+++ b/gm/bitmapfilters.cpp
@@ -53,7 +53,7 @@
     const int scale = 32;
 
     paint.setAntiAlias(true);
-    sk_tool_utils::set_portable_typeface_always(&paint);
+    sk_tool_utils::set_portable_typeface(&paint);
     const char* name = sk_tool_utils::colortype_name(bm.colorType());
     canvas->drawText(name, strlen(name), x, SkIntToScalar(bm.height())*scale*5/8,
                      paint);
@@ -80,7 +80,7 @@
     SkBitmap    fBM8, fBM4444, fBM16, fBM32;
 
     FilterGM() {
-        this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
+        this->setBGColor(0xFFDDDDDD);
     }
 
 protected: