Enable size_t to int truncation warnings in PPAPI

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 74 matching lines @@
 
   status = U_ZERO_ERROR;
   int match_start = usearch_first(searcher, &status);
   DCHECK(status == U_ZERO_ERROR);
 
   std::vector<PP_PrivateFindResult> pp_results;
   while (match_start != USEARCH_DONE) {
     size_t matched_length = usearch_getMatchedLength(searcher);
     PP_PrivateFindResult result;
     result.start_index = match_start;
-    result.length = matched_length;
+    result.length = static_cast<uint32_t>(matched_length);
     pp_results.push_back(result);
     match_start = usearch_next(searcher, &status);
     DCHECK(status == U_ZERO_ERROR);
   }
 
-  *count = pp_results.size();
+  *count = static_cast<uint32_t>(pp_results.size());
   if (*count) {
     *results = reinterpret_cast<PP_PrivateFindResult*>(malloc(
         *count * sizeof(PP_PrivateFindResult)));
     memcpy(*results, &pp_results[0], *count * sizeof(PP_PrivateFindResult));
   } else {
     *results = NULL;
   }
 
   usearch_close(searcher);
 }
@@ skipping 97 matching lines @@
 void PDFResource::GetV8ExternalSnapshotData(const char** natives_data_out,
                                             int* natives_size_out,
                                             const char** snapshot_data_out,
                                             int* snapshot_size_out) {
   gin::IsolateHolder::GetV8ExternalSnapshotData(natives_data_out,
       natives_size_out, snapshot_data_out, snapshot_size_out);
 }
 
 }  // namespace proxy
 }  // namespace ppapi