Revert "[iOS] Add Overrides provider"

This reverts commit e7684fe6.

Reason for revert: Break the tests

Original change's description:
> [iOS] Add Overrides provider
> 
> The provider is used to install overrides.
> 
> Bug: 954570
> Change-Id: I89acf24af55f3e657db9f421dec8330abac1e64b
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1584265
> Reviewed-by: Eugene But <eugenebut@chromium.org>
> Commit-Queue: Gauthier Ambard <gambard@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#654815}

TBR=eugenebut@chromium.org,kkhorimoto@chromium.org,gambard@chromium.org

Change-Id: Ia22048bb36549154f8201072be00665ad04c097f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 954570
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1587600Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#654820}

ios/chrome/app/main_controller.mm

@@ -152,7 +152,6 @@
 #include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 #include "ios/public/provider/chrome/browser/distribution/app_distribution_provider.h"
 #include "ios/public/provider/chrome/browser/mailto/mailto_handler_provider.h"
-#import "ios/public/provider/chrome/browser/overrides_provider.h"
 #include "ios/public/provider/chrome/browser/signin/chrome_identity_service.h"
 #import "ios/public/provider/chrome/browser/user_feedback/user_feedback_provider.h"
 #import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
@@ -794,8 +793,6 @@ enum class EnterTabSwitcherSnapshotResult {
         notifyForeground:_mainBrowserState];
   }
 
-  ios::GetChromeBrowserProvider()->GetOverridesProvider()->InstallOverrides();
-
   [self scheduleLowPriorityStartupTasks];
 
   [_browserViewWrangler updateDeviceSharingManager];

ios/public/provider/chrome/browser/BUILD.gn

@@ -13,8 +13,6 @@ source_set("browser") {
     "chrome_browser_provider.mm",
     "geolocation_updater_provider.h",
     "geolocation_updater_provider.mm",
-    "overrides_provider.h",
-    "overrides_provider.mm",
   ]
   deps = [
     "//base",

ios/public/provider/chrome/browser/chrome_browser_provider.h

@@ -22,7 +22,6 @@ class BrowserURLRewriterProvider;
 class FullscreenProvider;
 class MailtoHandlerProvider;
 class OmahaServiceProvider;
-class OverridesProvider;
 class SpecialUserProvider;
 class SpotlightProvider;
 class UserFeedbackProvider;
@@ -164,9 +163,6 @@ class ChromeBrowserProvider {
   // Returns an instance of the BrowserURLRewriter provider.
   virtual BrowserURLRewriterProvider* GetBrowserURLRewriterProvider() const;
 
-  // Returns an instance of the Overrides provider;
-  virtual OverridesProvider* GetOverridesProvider() const;
-
   // Adds and removes observers.
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);

ios/public/provider/chrome/browser/chrome_browser_provider.mm

@@ -118,10 +118,6 @@ ChromeBrowserProvider::GetBrowserURLRewriterProvider() const {
   return nullptr;
 }
 
-OverridesProvider* ChromeBrowserProvider::GetOverridesProvider() const {
-  return nullptr;
-}
-
 MailtoHandlerProvider* ChromeBrowserProvider::GetMailtoHandlerProvider() const {
   return mailto_handler_provider_.get();
 }

ios/public/provider/chrome/browser/overrides_provider.h

-// Copyright 2019 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.
-
-#ifndef IOS_PUBLIC_PROVIDER_CHROME_BROWSER_OVERRIDES_PROVIDER_H_
-#define IOS_PUBLIC_PROVIDER_CHROME_BROWSER_OVERRIDES_PROVIDER_H_
-
-// Provider for installing overrides.
-class OverridesProvider {
- public:
-  OverridesProvider();
-  virtual ~OverridesProvider();
-
-  virtual void InstallOverrides();
-};
-
-#endif  // IOS_PUBLIC_PROVIDER_CHROME_BROWSER_OVERRIDES_PROVIDER_H_

ios/public/provider/chrome/browser/overrides_provider.mm

-// Copyright 2019 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/public/provider/chrome/browser/overrides_provider.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-OverridesProvider::OverridesProvider() = default;
-
-OverridesProvider::~OverridesProvider() = default;
-
-void OverridesProvider::InstallOverrides() {}