Everyone gets a namespace {}.

src/opts/SkPMFloat_none.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
+namespace {  // See SkPMFloat.h
+
 inline SkPMFloat::SkPMFloat(SkPMColor c) {
     *this = SkPMFloat::FromARGB(SkGetPackedA32(c),
                                 SkGetPackedR32(c),
                                 SkGetPackedG32(c),
                                 SkGetPackedB32(c));
     SkASSERT(this->isValid());
 }
 
 inline SkPMColor SkPMFloat::trunc() const {
     return SkPackARGB32(this->a(), this->r(), this->g(), this->b());
@@ skipping 37 matching lines @@
 }
 
 inline void SkPMFloat::RoundClampTo4PMColors(
         const SkPMFloat& a, const SkPMFloat& b, const SkPMFloat&c, const SkPMFloat& d,
         SkPMColor colors[4]) {
     colors[0] = a.roundClamp();
     colors[1] = b.roundClamp();
     colors[2] = c.roundClamp();
     colors[3] = d.roundClamp();
 }
+
+}  // namespace