Use stricter type checking in UMA_HISTOGRAM_ENUMERATION

ios/chrome/today_extension/today_view_controller.mm

 // Copyright 2014 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/today_extension/today_view_controller.h"
 
 #import <CommonCrypto/CommonDigest.h>
 #import <NotificationCenter/NotificationCenter.h>
 #include <unistd.h>
 
@@ skipping 899 matching lines @@
   int state =
       [[LockScreenState sharedInstance] isScreenLocked] ? LOCKED_FLAG : 0;
   state |= (_bluetoothIsOn ? BLUETOOTH_FLAG : 0);
   if (!_physicalWebInInitialState) {
     state |= (_physicalWebActive ? PHYSICAL_WEB_ACTIVE_FLAG : 0);
     state |= (_physicalWebOptedIn ? PHYSICAL_WEB_OPTED_IN_FLAG : 0);
   } else {
     state |= PHYSICAL_WEB_OPTED_IN_UNDECIDED_FLAG;
   }
   DCHECK(state < PHYSICAL_WEB_INITIAL_STATE_COUNT);
-  UMA_HISTOGRAM_ENUMERATION("PhysicalWeb.InitialState", state,
+  UMA_HISTOGRAM_ENUMERATION("PhysicalWeb.InitialState",
+                            static_cast<PhysicalWebInitialState>(state),
                             PHYSICAL_WEB_INITIAL_STATE_COUNT);
 }
 
 - (void)scannerBluetoothStatusUpdated:(PhysicalWebScanner*)scanner {
   _bluetoothIsOn = [scanner bluetoothEnabled];
   [self reportInitialState];
 
   if (_bluetoothIsOn && _physicalWebActive) {
     [self startPhysicalWeb];
   } else {
@@ skipping 156 matching lines @@
     if (ui_util::IsRTL()) {
       _defaultLeadingMarginInset = defaultMarginInsets.right;
     } else {
       _defaultLeadingMarginInset = defaultMarginInsets.left;
     }
   }
   return UIEdgeInsetsZero;
 }
 
 @end