Update some uses of char16 to use the base:: namespace.

ppapi/proxy/pdf_resource.cc

 // Copyright (c) 2013 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 "ppapi/proxy/pdf_resource.h"
 
 #include <stdlib.h>
 #include <string.h>
 
 #include "base/command_line.h"
@@ skipping 44 matching lines @@
     return PP_MakeUndefined();
   return ppapi::StringVar::StringToPPVar(localized_string);
 }
 
 void PDFResource::SearchString(const unsigned short* input_string,
                                const unsigned short* input_term,
                                bool case_sensitive,
                                PP_PrivateFindResult** results, int* count) {
   if (locale_.empty())
     locale_ = GetLocale();
-  const char16* string = reinterpret_cast<const char16*>(input_string);
-  const char16* term = reinterpret_cast<const char16*>(input_term);
+  const base::char16* string =
+      reinterpret_cast<const base::char16*>(input_string);
+  const base::char16* term =
+      reinterpret_cast<const base::char16*>(input_term);
 
   UErrorCode status = U_ZERO_ERROR;
   UStringSearch* searcher = usearch_open(term, -1, string, -1, locale_.c_str(),
                                          0, &status);
   DCHECK(status == U_ZERO_ERROR || status == U_USING_FALLBACK_WARNING ||
          status == U_USING_DEFAULT_WARNING);
   UCollationStrength strength = case_sensitive ? UCOL_TERTIARY : UCOL_PRIMARY;
 
   UCollator* collator = usearch_getCollator(searcher);
   if (ucol_getStrength(collator) != strength) {
@@ skipping 110 matching lines @@
 PP_Resource PDFResource::GetResourceImage(PP_ResourceImage image_id) {
   return GetResourceImageForScale(image_id, 1.0f);
 }
 
 PP_Bool PDFResource::IsOutOfProcess() {
   return PP_TRUE;
 }
 
 }  // namespace proxy
 }  // namespace ppapi