Fix for PDFs with lots of named destinations take a long time to load.

pdf/out_of_process_instance.cc

Index: pdf/out_of_process_instance.cc
diff --git a/pdf/out_of_process_instance.cc b/pdf/out_of_process_instance.cc
index 169a4403498a21b2a2eb9dac16f5c88ff5e022f8..a365871cdbe67efc4f8064ce0cbffd86e4b81e43 100644
--- a/pdf/out_of_process_instance.cc
+++ b/pdf/out_of_process_instance.cc
@@ -140,9 +140,13 @@ const char kJSGetSelectedTextType[] = "getSelectedText";
 const char kJSGetSelectedTextReplyType[] = "getSelectedTextReply";
 const char kJSSelectedText[] = "selectedText";
 
-// List of named destinations (Plugin -> Page)
-const char kJSSetNamedDestinationsType[] = "setNamedDestinations";
-const char kJSNamedDestinations[] = "namedDestinations";
+// Get the named destinations (Page -> Plugin)
+const char KJSGetNamedDestinationType[] = "getNamedDestination";
+const char KJSGetNamedDestination[] = "namedDestination";
+const char KJSGetNavigationUrl[] = "navigationUrl";
+// Reply with page number of named destination (Plugin -> Page)
+const char kJSGetNamedDestinationReplyType[] = "getNamedDestinationReply";
+const char kJSNamedDestinationPageNumber[] = "namedDestinationPageNumber";
 
 const int kFindResultCooldownMs = 100;
 
@@ -476,6 +480,18 @@ void OutOfProcessInstance::HandleMessage(const pp::Var& message) {
     reply.Set(pp::Var(kType), pp::Var(kJSGetSelectedTextReplyType));
     reply.Set(pp::Var(kJSSelectedText), selected_text);
     PostMessage(reply);
+  } else if (type == KJSGetNamedDestinationType &&
+             dict.Get(pp::Var(KJSGetNamedDestination)).is_string()) {
+    int page_number = engine_->GetNamedDestinationPage(
+        dict.Get(pp::Var(KJSGetNamedDestination)).AsString());
+    pp::VarDictionary reply;
+    reply.Set(pp::Var(kType), pp::Var(kJSGetNamedDestinationReplyType));
+    if (dict.Get(pp::Var(KJSGetNavigationUrl)).is_string())
+      reply.Set(pp::Var(KJSGetNavigationUrl),
+                dict.Get(pp::Var(KJSGetNavigationUrl)));
+    if (page_number >= 0)
+      reply.Set(pp::Var(kJSNamedDestinationPageNumber), page_number);
+    PostMessage(reply);
   } else {
     NOTREACHED();
   }
@@ -1091,14 +1107,6 @@ void OutOfProcessInstance::DocumentLoadComplete(int page_count) {
     OnGeometryChanged(0, 0);
   }
 
-  pp::VarDictionary named_destinations_message;
-  pp::VarDictionary named_destinations = engine_->GetNamedDestinations();
-  named_destinations_message.Set(pp::Var(kType),
-                                 pp::Var(kJSSetNamedDestinationsType));
-  named_destinations_message.Set(pp::Var(kJSNamedDestinations),
-                                 pp::Var(named_destinations));
-  PostMessage(named_destinations_message);
-
   pp::VarDictionary bookmarks_message;
   bookmarks_message.Set(pp::Var(kType), pp::Var(kJSBookmarksType));
   bookmarks_message.Set(pp::Var(kJSBookmarks), engine_->GetBookmarks());