Merge CWVWebsiteDataStore into CWVWebViewConfiguration.

ios/web_view/internal/cwv_web_view_configuration.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.
 
 #import "ios/web_view/public/cwv_web_view_configuration.h"
+#import "ios/web_view/internal/cwv_web_view_configuration_internal.h"
 
-#import "ios/web_view/public/cwv_website_data_store.h"
+#import "ios/web_view/internal/web_view_browser_state.h"
+#import "ios/web_view/internal/web_view_web_client.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 @interface CWVWebViewConfiguration ()
-// Initialize configuration with specified data store.
-- (instancetype)initWithDataStore:(CWVWebsiteDataStore*)dataStore;
+// Initialize configuration with the specified browser state.
+- (instancetype)initWithBrowserState:
+    (ios_web_view::WebViewBrowserState*)browserState;
 @end
 
-@implementation CWVWebViewConfiguration
-
-@synthesize websiteDataStore = _websiteDataStore;
-
-- (instancetype)init {
-  return [self initWithDataStore:[CWVWebsiteDataStore defaultDataStore]];
+@implementation CWVWebViewConfiguration {
+  // TODO(crbug.com/690182): CWVWebViewConfiguration should own _browserState.
+  ios_web_view::WebViewBrowserState* _browserState;
 }
 
-- (instancetype)initWithDataStore:(CWVWebsiteDataStore*)dataStore {
++ (instancetype)defaultConfiguration {
+  static dispatch_once_t once;
+  static CWVWebViewConfiguration* configuration;
+  dispatch_once(&once, ^{
+    ios_web_view::WebViewWebClient* client =
+        static_cast<ios_web_view::WebViewWebClient*>(web::GetWebClient());
+    configuration = [[self alloc] initWithBrowserState:client->browser_state()];
+  });
+  return configuration;
+}
+
++ (instancetype)incognitoConfiguration {
+  static dispatch_once_t once;
+  static CWVWebViewConfiguration* configuration;
+  dispatch_once(&once, ^{
+    ios_web_view::WebViewWebClient* client =
+        static_cast<ios_web_view::WebViewWebClient*>(web::GetWebClient());
+    configuration = [[self alloc]
+        initWithBrowserState:client->off_the_record_browser_state()];
+  });
+  return configuration;
+}
+
+- (instancetype)initWithBrowserState:
+    (ios_web_view::WebViewBrowserState*)browserState {
   self = [super init];
   if (self) {
-    _websiteDataStore = dataStore;
+    _browserState = browserState;
   }
   return self;
 }
 
+- (BOOL)isPersistent {
+  return !_browserState->IsOffTheRecord();
+}
+
+- (ios_web_view::WebViewBrowserState*)browserState {
+  return _browserState;
+}
+
 // NSCopying
 
 - (id)copyWithZone:(NSZone*)zone {
-  return
-      [[[self class] allocWithZone:zone] initWithDataStore:_websiteDataStore];
+  return [[[self class] allocWithZone:zone] initWithBrowserState:_browserState];
 }
 
 @end