Revert of Revert of make gm background colors 565 compatible (patchset #1 id:1 of https://codereview.chromium.org/1184123002/)

Reason for revert:
underlying problem with portable refs deleted more than once fixed

Original issue's description:
> 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
>
> Committed: https://skia.googlesource.com/skia/+/0bdb08b1ba8fbd18c4838f86a23f1ef4b3a3bfdf

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

Review URL: https://codereview.chromium.org/1182403003
diff --git a/gm/shadertext3.cpp b/gm/shadertext3.cpp
index 49cdced..47dd29e 100644
--- a/gm/shadertext3.cpp
+++ b/gm/shadertext3.cpp
@@ -48,7 +48,7 @@
 class ShaderText3GM : public GM {
 public:
     ShaderText3GM() {
-        this->setBGColor(0xFFDDDDDD);
+        this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
     }
 
 protected:
@@ -73,7 +73,7 @@
 
         SkPaint outlinePaint;
         outlinePaint.setAntiAlias(true);
-        sk_tool_utils::set_portable_typeface(&outlinePaint);
+        sk_tool_utils::set_portable_typeface_always(&outlinePaint);
         outlinePaint.setTextSize(SkIntToScalar(kPointSize));
         outlinePaint.setStyle(SkPaint::kStroke_Style);
         outlinePaint.setStrokeWidth(0.f);
@@ -107,7 +107,7 @@
 
                 SkPaint fillPaint;
                 fillPaint.setAntiAlias(true);
-                sk_tool_utils::set_portable_typeface(&fillPaint);
+                sk_tool_utils::set_portable_typeface_always(&fillPaint);
                 fillPaint.setTextSize(SkIntToScalar(kPointSize));
                 fillPaint.setFilterQuality(kLow_SkFilterQuality);
                 fillPaint.setShader(shader);