Add the navigation redirect-chain to Sync sessions proto for offline analysis.

android_webview/native/state_serializer.cc

Index: android_webview/native/state_serializer.cc
diff --git a/android_webview/native/state_serializer.cc b/android_webview/native/state_serializer.cc
index 9b013a17710e7728edff61f7af7d89a7486dbbbb..f0787d53bba14d70705fd60fa9b21af449558a1d 100644
--- a/android_webview/native/state_serializer.cc
+++ b/android_webview/native/state_serializer.cc
@@ -35,7 +35,7 @@ namespace {
 // Sanity check value that we are restoring from a valid pickle.
 // This can potentially used as an actual serialization version number in the
 // future if we ever decide to support restoring from older versions.
-const uint32 AW_STATE_VERSION = 20130814;
+const uint32 AW_STATE_VERSION = 20140115;
 
 }  // namespace
 
@@ -189,6 +189,18 @@ bool WriteNavigationEntryToPickle(const content::NavigationEntry& entry,
   if (!pickle->WriteInt(entry.GetHttpStatusCode()))
     return false;
 
+  // The redirect chain has a variable number of entries.
+  bool did_write_all_redirects = true;
+  if (!pickle->WriteUInt16(entry.GetRedirectChain().size()))
+    return false;
+  for (size_t i = 0; i < entry.GetRedirectChain().size(); i++) {
+    if (!pickle->WriteString(entry.GetRedirectChain().at(i).spec())) {
+      did_write_all_redirects = false;
+    }
+  }
+  if (!did_write_all_redirects)
+    return false;
+
   // Please update AW_STATE_VERSION if serialization format is changed.
 
   return true;
@@ -282,6 +294,27 @@ bool RestoreNavigationEntryFromPickle(PickleIterator* iterator,
     entry->SetHttpStatusCode(http_status_code);
   }
 
+  {
+    unsigned short redirect_chain_length = 0;
+    if (!iterator->ReadUInt16(&redirect_chain_length))
+      return false;
+    std::vector<GURL> full_redirect_chain;
+    bool was_full_chain_read_successfully = true;
+    for (size_t i = 0; i < redirect_chain_length; i++) {
+      std::string a_redirect;
+      if (!iterator->ReadString(&a_redirect)) {
+        was_full_chain_read_successfully = false;
+      } else {
+        full_redirect_chain.push_back(GURL(a_redirect));
+      }
+    }
+    if (was_full_chain_read_successfully) {
+      entry->SetRedirectChain(full_redirect_chain);
+    } else {
+      return false;
+    }
+  }
+
   return true;
 }