Make UTF16ToASCII and UTF16TOUTF8 take a StringPiece

content/child/browser_font_resource_trusted.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/child/browser_font_resource_trusted.h"
 
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/common/web_preferences.h"
 #include "ppapi/c/dev/ppb_font_dev.h"
@@ skipping 254 matching lines @@
 
 PP_Bool BrowserFontResource_Trusted::Describe(
     PP_BrowserFont_Trusted_Description* description,
     PP_BrowserFont_Trusted_Metrics* metrics) {
   if (description->face.type != PP_VARTYPE_UNDEFINED)
     return PP_FALSE;
 
   // While converting the other way in PPFontDescToWebFontDesc we validated
   // that the enums can be casted.
   WebFontDescription web_desc = font_->fontDescription();
-  description->face =
-      StringVar::StringToPPVar(base::UTF16ToUTF8(web_desc.family));
+  description->face = StringVar::StringToPPVar(base::UTF16ToUTF8(
+      base::StringPiece16(web_desc.family)));
   description->family =
       static_cast<PP_BrowserFont_Trusted_Family>(web_desc.genericFamily);
   description->size = static_cast<uint32_t>(web_desc.size);
   description->weight = static_cast<PP_BrowserFont_Trusted_Weight>(
       web_desc.weight);
   description->italic = web_desc.italic ? PP_TRUE : PP_FALSE;
   description->small_caps = web_desc.smallCaps ? PP_TRUE : PP_FALSE;
   description->letter_spacing = static_cast<int32_t>(web_desc.letterSpacing);
   description->word_spacing = static_cast<int32_t>(web_desc.wordSpacing);
 
@@ skipping 151 matching lines @@
 
     // Advance to the next run. Note that we avoid doing this for the last run
     // since it's unnecessary, measuring text is slow, and most of the time
     // there will be only one run anyway.
     if (i != runs.num_runs() - 1)
       web_position.x += font_->calculateWidth(run);
   }
 }
 
 }  // namespace content