Enable lost URL detection in the Physical Web scanner

ios/chrome/common/physical_web/physical_web_request.mm

 // Copyright 2015 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.
 
 #import "ios/chrome/common/physical_web/physical_web_request.h"
 
 #include "base/ios/weak_nsobject.h"
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_block.h"
@@ skipping 55 matching lines @@
     device_.reset([device retain]);
   }
   return self;
 }
 
 - (instancetype)init {
   NOTREACHED();
   return nil;
 }
 
+- (NSURL*)requestURL {
+  return [device_ requestURL];
+}
+
 - (void)cancel {
   [urlSessionTask_ cancel];
   block_.reset();
 }
 
 - (void)start:(physical_web::RequestFinishedBlock)block {
   block_.reset([block copy]);
   data_.reset([[NSMutableData alloc] init]);
 
   // Creates the HTTP post request.
   base::scoped_nsobject<NSURLComponents> components(
       [[NSURLComponents alloc] initWithString:kMetadataServiceUrl]);
   NSString* apiKey =
       [NSString stringWithUTF8String:google_apis::GetAPIKey().c_str()];
   [components
       setQueryItems:@[ [NSURLQueryItem queryItemWithName:kKeyQueryItemName
                                                    value:apiKey] ]];
   NSURL* url = [components URL];
   request_.reset([[NSMutableURLRequest requestWithURL:url] retain]);
   [request_ setHTTPMethod:kHTTPPOSTRequestMethod];
 
   // body of the POST request.
   NSDictionary* jsonBody =
-      @{ kUrlsKey : @[ @{kUrlKey : [[device_ url] absoluteString]} ] };
+      @{ kUrlsKey : @[ @{kUrlKey : [[device_ requestURL] absoluteString]} ] };
   [request_ setHTTPBody:[NSJSONSerialization dataWithJSONObject:jsonBody
                                                         options:0
                                                           error:NULL]];
   [request_ setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
   [request_ setValue:base::SysUTF8ToNSString(GetUserAgent())
       forHTTPHeaderField:@"User-Agent"];
 
   // Set the Accept-Language header from the locale language code. This may
   // cause us to fetch metadata for the wrong region in languages such as
   // Chinese that vary significantly between regions.
@@ skipping 115 matching lines @@
         block_.get()(nil, error);
       }
       return;
     }
 
     // Read optional fields.
     NSString* iconString = base::mac::ObjCCast<NSString>(pageInfo[kIconKey]);
     NSString* description =
         base::mac::ObjCCast<NSString>(pageInfo[kDescriptionKey]);
     NSString* title = base::mac::ObjCCast<NSString>(pageInfo[kTitleKey]);
-    NSURL* scannedUrl =
-        scannedUrlString ? [NSURL URLWithString:scannedUrlString] : nil;
     NSURL* resolvedUrl =
         resolvedUrlString ? [NSURL URLWithString:resolvedUrlString] : nil;
     NSURL* icon = iconString ? [NSURL URLWithString:iconString] : nil;
     base::scoped_nsobject<PhysicalWebDevice> device([[PhysicalWebDevice alloc]
           initWithURL:resolvedUrl
-           requestURL:scannedUrl
+           requestURL:[device_ requestURL]
                  icon:icon
                 title:title
           description:description
         transmitPower:[device_ transmitPower]
                  rssi:[device_ rssi]
-                 rank:physical_web::kMaxRank]);
+                 rank:physical_web::kMaxRank
+        scanTimestamp:[device_ scanTimestamp]]);
     if (block_.get() != nil) {
       block_.get()(device, nil);
     }
   }
 }
 
 @end