Suppress the Bluetooth prompt when Chrome is launched with BT disabled

ios/chrome/common/physical_web/physical_web_scanner.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_scanner.h"
 
 #import <CoreBluetooth/CoreBluetooth.h>
 
 #include <string>
 #include <vector>
@@ skipping 91 matching lines @@
 - (instancetype)initWithDelegate:(id<PhysicalWebScannerDelegate>)delegate {
   self = [super init];
   if (self) {
     delegate_ = delegate;
     devices_.reset([[NSMutableArray alloc] init]);
     devicesUrls_.reset([[NSMutableSet alloc] init]);
     finalUrls_.reset([[NSMutableSet alloc] init]);
     pendingRequests_.reset([[NSMutableArray alloc] init]);
     centralManager_.reset([[CBCentralManager alloc]
         initWithDelegate:self
-                   queue:dispatch_get_main_queue()]);
+                   queue:dispatch_get_main_queue()
+                 options:@{
+                   CBCentralManagerOptionShowPowerAlertKey : @NO
+                 }]);
     unresolvedDevices_.reset([[NSMutableArray alloc] init]);
     [[NSHTTPCookieStorage sharedHTTPCookieStorage]
         setCookieAcceptPolicy:NSHTTPCookieAcceptPolicyNever];
   }
   return self;
 }
 
 - (instancetype)init {
   NOTREACHED();
   return nil;
@@ skipping 357 matching lines @@
         [strongSelf.get()->devices_ addObject:device];
         [strongSelf.get()->delegate_ scannerUpdatedDevices:weakSelf];
         [strongSelf.get()->finalUrls_ addObject:[device url]];
       }
     }
     [strongSelf.get()->pendingRequests_ removeObject:strongRequest];
   }];
 }
 
 @end