[CRD iOS] Fix color scheme and other UI issues

remoting/ios/app/host_collection_view_cell.mm

 // Copyright 2017 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.
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 #import <UIKit/UIKit.h>
 
 #import "remoting/ios/app/host_collection_view_cell.h"
 
 #import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
+#import "remoting/ios/app/remoting_theme.h"
 #import "remoting/ios/domain/host_info.h"
 
 static const CGFloat kLinePadding = 2.f;
 static const CGFloat kHostCardIconInset = 10.f;
 static const CGFloat kHostCardPadding = 4.f;
 static const CGFloat kHostCardIconSize = 45.f;
 
 @interface HostCollectionViewCell () {
   UIImageView* _imageView;
   UILabel* _statusLabel;
@@ skipping 18 matching lines @@
     [self commonInit];
   }
   return self;
 }
 
 - (void)commonInit {
   _imageView = [[UIImageView alloc] init];
   _imageView.translatesAutoresizingMaskIntoConstraints = NO;
   _imageView.contentMode = UIViewContentModeCenter;
   _imageView.alpha = 0.87f;
-  _imageView.backgroundColor = UIColor.lightGrayColor;
+  _imageView.backgroundColor = RemotingTheme.offlineHostColor;
   _imageView.layer.cornerRadius = kHostCardIconSize / 2.f;
   _imageView.layer.masksToBounds = YES;
   [self.contentView addSubview:_imageView];
 
   // Holds both of the labels.
   _labelView = [[UIView alloc] init];
   _labelView.translatesAutoresizingMaskIntoConstraints = NO;
   [self.contentView addSubview:_labelView];
 
   _titleLabel = [[UILabel alloc] init];
@@ skipping 61 matching lines @@
 
 #pragma mark - HostCollectionViewCell Public
 
 - (void)populateContentWithHostInfo:(HostInfo*)hostInfo {
   _hostInfo = hostInfo;
 
   _titleLabel.text = _hostInfo.hostName;
 
   _imageView.image = [UIImage imageNamed:@"ic_desktop"];
 
-  // TODO(nicholss): These colors are incorrect for the final product.
-  // Need to update to the values in the mocks.
   if ([_hostInfo.status isEqualToString:@"ONLINE"]) {
-    _imageView.backgroundColor = UIColor.greenColor;
+    _imageView.backgroundColor = RemotingTheme.onlineHostColor;
     _statusLabel.text = @"Online";
   } else {
-    _imageView.backgroundColor = UIColor.lightGrayColor;
+    _imageView.backgroundColor = RemotingTheme.offlineHostColor;
     _statusLabel.text =
         [NSString stringWithFormat:@"Last online: %@", hostInfo.updatedTime];
   }
 }
 
 #pragma mark - UICollectionReusableView
 
 - (void)prepareForReuse {
   [super prepareForReuse];
   _hostInfo = nil;
   _statusLabel.text = nil;
   _titleLabel.text = nil;
 }
 
 @end