Re-sync ios/web with downstream version

ios/web/public/navigation_item.h

 // 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_PUBLIC_NAVIGATION_ITEM_H_
 #define IOS_WEB_PUBLIC_NAVIGATION_ITEM_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 #include "ios/web/public/web_state/page_scroll_state.h"
 #include "ui/base/page_transition_types.h"
 
 class GURL;
 
+#if defined(__OBJC__)
+@class NSDictionary;
+#else
+class NSDictionary;
+#endif  // __OBJC__
+
 namespace web {
 struct FaviconStatus;
 struct Referrer;
 struct SSLStatus;
 
 // A NavigationItem is a data structure that captures all the information
 // required to recreate a browsing state. It represents one point in the
 // chain of navigation managed by a NavigationManager.
 class NavigationItem {
  public:
@@ skipping 81 matching lines @@
   //   - this navigation was restored and for some reason the
   //     timestamp wasn't available;
   //   - or this navigation was copied from a foreign session.
   virtual void SetTimestamp(base::Time timestamp) = 0;
   virtual base::Time GetTimestamp() const = 0;
 
   // |true| if this item contains unsafe resources and will be removed. This
   // property doesn't get serialized.
   virtual void SetUnsafe(bool is_unsafe) = 0;
   virtual bool IsUnsafe() const = 0;
+
+  // |true| if this item uses a desktop user agent in HTTP requests and
+  // UIWebView.
+  virtual void SetIsOverridingUserAgent(bool is_overriding_user_agent) = 0;
+  virtual bool IsOverridingUserAgent() const = 0;
+
+  // |true| if this item is the result of a POST request with data.
+  virtual bool HasPostData() const = 0;
+
+  // Returns the item's current http request headers.
+  virtual NSDictionary* GetHttpRequestHeaders() const = 0;
+
+  // Adds headers from |additional_headers| to the item's http request headers.
+  // Existing headers with the same key will be overridden.
+  virtual void AddHttpRequestHeaders(NSDictionary* additional_headers) = 0;
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_PUBLIC_NAVIGATION_ITEM_H_