Include referrer chain with inline install requests.

chrome/browser/extensions/webstore_inline_installer.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 "chrome/browser/extensions/webstore_inline_installer.h"
 
+#include <utility>
+
+#include "base/json/json_writer.h"
 #include "base/strings/stringprintf.h"
+#include "base/values.h"
+#include "chrome/browser/extensions/webstore_data_fetcher.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/exclusive_access/fullscreen_controller.h"
 #include "content/public/browser/navigation_details.h"
+#include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/web_contents.h"
 
 using content::WebContents;
 
 namespace extensions {
 
 const char kInvalidWebstoreResponseError[] =
     "Invalid Chrome Web Store response.";
 const char kNoVerifiedSitesError[] =
     "Inline installs can only be initiated for Chrome Web Store items that "
@@ skipping 66 matching lines @@
     }
   }
   if (!requestor_is_ok) {
     *error = kNotFromVerifiedSitesError;
     return false;
   }
   *error = "";
   return true;
 }
 
+std::string WebstoreInlineInstaller::GetJsonPostData() {
+  // web_contents() might return null during tab destruction. This object would
+  // also be destroyed shortly thereafter but check to be on the safe side.
+  if (!web_contents())
+    return std::string();
+
+  content::NavigationController& navigation_controller =
+      web_contents()->GetController();
+  content::NavigationEntry* navigation_entry =
+      navigation_controller.GetLastCommittedEntry();
+
+  if (navigation_entry) {
+    const std::vector<GURL>& redirect_urls =
+        navigation_entry->GetRedirectChain();
+
+    if (!redirect_urls.empty()) {
+      base::DictionaryValue dictionary;
+      dictionary.SetString("id", id());
+      dictionary.SetString("referrer", requestor_url_.spec());
+      std::unique_ptr<base::ListValue> redirect_chain =
+          base::MakeUnique<base::ListValue>();
+      for (const GURL& url : redirect_urls) {
+        redirect_chain->AppendString(url.spec());
+      }
+      dictionary.Set("redirect_chain", std::move(redirect_chain));
+
+      std::string json;
+      base::JSONWriter::Write(dictionary, &json);
+      return json;
+    }
+  }
+
+  return std::string();
+}
+
 bool WebstoreInlineInstaller::CheckRequestorAlive() const {
   // The frame or tab may have gone away - cancel installation in that case.
   return host_ != nullptr && web_contents() != nullptr;
 }
 
 const GURL& WebstoreInlineInstaller::GetRequestorURL() const {
   return requestor_url_;
 }
 
 std::unique_ptr<ExtensionInstallPrompt::Prompt>
@@ skipping 137 matching lines @@
     DLOG(WARNING) << "Could not parse " << verified_site_pattern_spec <<
         " as URL pattern " << parse_result;
     return false;
   }
   verified_site_pattern.SetScheme("*");
 
   return verified_site_pattern.MatchesURL(requestor_url);
 }
 
 }  // namespace extensions