Introduce content::PageState (again).

content/browser/web_contents/navigation_entry_impl_unittest.cc

 // Copyright (c) 2012 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 "base/string16.h"
 #include "base/string_util.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "content/browser/site_instance_impl.h"
 #include "content/browser/web_contents/navigation_entry_impl.h"
@@ skipping 124 matching lines @@
       Referrer(GURL("from2"), WebKit::WebReferrerPolicyDefault));
   EXPECT_EQ(GURL("from2"), entry2_->GetReferrer().url);
 
   // Title
   EXPECT_EQ(string16(), entry1_->GetTitle());
   EXPECT_EQ(ASCIIToUTF16("title"), entry2_->GetTitle());
   entry2_->SetTitle(ASCIIToUTF16("title2"));
   EXPECT_EQ(ASCIIToUTF16("title2"), entry2_->GetTitle());
 
   // State
-  EXPECT_EQ(std::string(), entry1_->GetContentState());
-  EXPECT_EQ(std::string(), entry2_->GetContentState());
-  entry2_->SetContentState("state");
-  EXPECT_EQ("state", entry2_->GetContentState());
+  EXPECT_FALSE(entry1_->GetPageState().IsValid());
+  EXPECT_FALSE(entry2_->GetPageState().IsValid());
+  entry2_->SetPageState(PageState::CreateFromEncodedData("state"));
+  EXPECT_EQ("state", entry2_->GetPageState().ToEncodedData());
 
   // Page ID
   EXPECT_EQ(-1, entry1_->GetPageID());
   EXPECT_EQ(3, entry2_->GetPageID());
   entry2_->SetPageID(2);
   EXPECT_EQ(2, entry2_->GetPageID());
 
   // Transition type
   EXPECT_EQ(PAGE_TRANSITION_LINK, entry1_->GetTransitionType());
   EXPECT_EQ(PAGE_TRANSITION_TYPED, entry2_->GetTransitionType());
@@ skipping 73 matching lines @@
   // Content in |output| is not modified if data is not present at the key.
   EXPECT_FALSE(entry1_->GetExtraData("search_terms", &output));
   EXPECT_EQ(test_data, output);
   // Using an empty string shows that the data is not present in the map.
   string16 output2;
   EXPECT_FALSE(entry1_->GetExtraData("search_terms", &output2));
   EXPECT_EQ(ASCIIToUTF16(""), output2);
 }
 
 }  // namespace content