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

chrome/renderer/pepper/ppb_pdf_impl.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 "chrome/renderer/pepper/ppb_pdf_impl.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/safe_numerics.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 225 matching lines @@
   return false;
 #endif
 }
 
 void SearchString(PP_Instance instance,
                   const unsigned short* input_string,
                   const unsigned short* input_term,
                   bool case_sensitive,
                   PP_PrivateFindResult** results,
                   int* count) {
-  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, RenderThread::Get()->GetLocale().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);
@@ skipping 194 matching lines @@
 
 // static
 void PPB_PDF_Impl::InvokePrintingForInstance(PP_Instance instance_id) {
 #if defined(ENABLE_FULL_PRINTING)
   blink::WebElement element = GetWebElement(instance_id);
   printing::PrintWebViewHelper* helper = GetPrintWebViewHelper(element);
   if (helper)
     helper->PrintNode(element);
 #endif  // ENABLE_FULL_PRINTING
 }