Add a Physical Web WebUI for Android

components/physical_web/webui/physical_web_base_message_handler.cc

 // Copyright 2016 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 "components/physical_web/webui/physical_web_base_message_handler.h"
 
 #include "base/bind.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/user_metrics.h"
 #include "components/physical_web/data_source/physical_web_data_source.h"
@@ skipping 22 matching lines @@
   base::DictionaryValue results;
 
   std::unique_ptr<base::ListValue> metadata =
       GetPhysicalWebDataSource()->GetMetadata();
 
   // Add item indices. When an item is selected, the index of the selected item
   // is recorded in a UMA histogram.
   for (size_t i = 0; i < metadata->GetSize(); i++) {
     base::DictionaryValue* metadata_item = nullptr;
     metadata->GetDictionary(i, &metadata_item);
-    metadata_item->SetInteger(physical_web_ui::kIndex, i);
+    metadata_item->SetInteger(physical_web_ui::kIndex, static_cast<int>(i));
   }
 
   results.Set(physical_web_ui::kMetadata, metadata.release());
 
   // Pass the list of Physical Web URL metadata to the WebUI. A jstemplate will
   // create a list view with an item for each URL.
   CallJavaScriptFunction(physical_web_ui::kReturnNearbyUrls, results);
 }
 
 void PhysicalWebBaseMessageHandler::HandlePhysicalWebItemClicked(
     const base::ListValue* args) {
   int index = 0;
   if (!args->GetInteger(0, &index)) {
     DLOG(ERROR) << "Invalid selection index";
     return;
   }
 
   // Record the index of the selected item.
   UMA_HISTOGRAM_EXACT_LINEAR("PhysicalWeb.WebUI.ListViewUrlPosition", index,
                              50);
 
   // Count the number of selections.
   base::RecordAction(
       base::UserMetricsAction("PhysicalWeb.WebUI.ListViewUrlSelected"));
 }
 
 } //  namespace physical_web_ui