[ios] Moved all web mocks to ios/web/public/test/fakes.

ios/web/browser_state_unittest.cc

 // 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.
 
 #include "ios/web/public/browser_state.h"
 
 #include "base/supports_user_data.h"
-#include "ios/web/public/test/test_browser_state.h"
+#include "ios/web/public/test/fakes/test_browser_state.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 class TestSupportsUserData : public base::SupportsUserData {
  public:
   TestSupportsUserData() {}
   ~TestSupportsUserData() override {}
 };
 }  // namespace
 
 TEST(BrowserStateTest, FromSupportsUserData_NullPointer) {
   DCHECK_EQ(static_cast<web::BrowserState*>(nullptr),
             web::BrowserState::FromSupportsUserData(nullptr));
 }
 
 TEST(BrowserStateTest, FromSupportsUserData_NonBrowserState) {
   TestSupportsUserData supports_user_data;
   DCHECK_EQ(static_cast<web::BrowserState*>(nullptr),
             web::BrowserState::FromSupportsUserData(&supports_user_data));
 }
 
 TEST(BrowserStateTest, FromSupportsUserData) {
   web::TestBrowserState browser_state;
   DCHECK_EQ(&browser_state,
             web::BrowserState::FromSupportsUserData(&browser_state));
 }