Replace prefix of ios/web_view C++ classes.

ios/web_view/internal/web_view_web_main_parts.h

Index: ios/web_view/internal/web_view_web_main_parts.h
diff --git a/ios/web_view/internal/web_view_web_main_parts.h b/ios/web_view/internal/web_view_web_main_parts.h
new file mode 100644
index 0000000000000000000000000000000000000000..0feebc7e805c5f4b1337266eb9b100997b1c7721
--- /dev/null
+++ b/ios/web_view/internal/web_view_web_main_parts.h
@@ -0,0 +1,47 @@
+// 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.
+
+#ifndef IOS_WEB_VIEW_INTERNAL_WEB_VIEW_WEB_MAIN_PARTS_H_
+#define IOS_WEB_VIEW_INTERNAL_WEB_VIEW_WEB_MAIN_PARTS_H_
+
+#include "ios/web/public/app/web_main_parts.h"
+
+#include <memory>
+
+@protocol CWVDelegate;
+
+namespace ios_web_view {
+class WebViewBrowserState;
+
+// WebView implementation of WebMainParts.
+class WebViewWebMainParts : public web::WebMainParts {
+ public:
+  explicit WebViewWebMainParts(id<CWVDelegate> delegate);
+  ~WebViewWebMainParts() override;
+
+  // WebMainParts implementation.
+  void PreMainMessageLoopRun() override;
+
+  // Returns the WebViewBrowserState for this embedder.
+  WebViewBrowserState* browser_state() const { return browser_state_.get(); }
+
+  // Returns the off the record WebViewBrowserState for this embedder.
+  WebViewBrowserState* off_the_record_browser_state() const {
+    return off_the_record_browser_state_.get();
+  }
+
+ private:
+  // This object's delegate.
+  __weak id<CWVDelegate> delegate_;
+
+  // The BrowserState for this embedder.
+  std::unique_ptr<WebViewBrowserState> browser_state_;
+
+  // Off The Record BrowserState for this embedder.
+  std::unique_ptr<WebViewBrowserState> off_the_record_browser_state_;
+};
+
+}  // namespace ios_web_view
+
+#endif  // IOS_WEB_VIEW_INTERNAL_WEB_VIEW_WEB_MAIN_PARTS_H_