[CRD iOS] Add the host setup instruction page

remoting/ios/app/remoting_theme.mm

 // 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.
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 #import "remoting/ios/app/remoting_theme.h"
 
@@ skipping 28 matching lines @@
                              blue:249.f / 255.f
                             alpha:1.f];
   });
   return color;
 }
 
 + (UIColor*)offlineHostColor {
   static UIColor* color;
   static dispatch_once_t onceToken;
   dispatch_once(&onceToken, ^{
-    color = [UIColor colorWithRed:0.75f green:0.75f blue:0.75f alpha:1.f];
+    color = [UIColor colorWithWhite:0.87f alpha:1.f];
   });
   return color;
 }
 
 + (UIColor*)onlineHostColor {
   static UIColor* color;
   static dispatch_once_t onceToken;
   dispatch_once(&onceToken, ^{
-    color = [UIColor colorWithRed:0.20f green:0.70f blue:0.20f alpha:1.f];
+    color = [UIColor colorWithRed:0.40f green:0.75f blue:0.40f alpha:1.f];
   });
   return color;
 }
 
++ (UIColor*)buttonTextColor {
+  return UIColor.whiteColor;
+}
+
++ (UIColor*)setupListBackgroundColor {
+  static UIColor* color;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    color = [UIColor colorWithWhite:1.f alpha:0.9f];
+  });
+  return color;
+}
+
++ (UIColor*)setupListTextColor {
+  return UIColor.grayColor;
+}
+
++ (UIColor*)setupListNumberColor {
+  return UIColor.whiteColor;
+}
+
 #pragma mark - Icons
 
 + (UIImage*)arrowIcon {
   static UIImage* icon;
   static dispatch_once_t onceToken;
   dispatch_once(&onceToken, ^{
     icon = [UIImage imageNamed:@"ic_arrow_forward_white"];
   });
   return icon;
 }
@@ skipping 82 matching lines @@
 + (UIImage*)settingsIcon {
   static UIImage* icon;
   static dispatch_once_t onceToken;
   dispatch_once(&onceToken, ^{
     icon = [UIImage imageNamed:@"Settings"];
   });
   return icon;
 }
 
 @end