re-use WebUIs

chrome/browser/ui/webui/options2/options_ui2.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/ui/webui/options2/options_ui2.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 322 matching lines @@
 }
 
 void OptionsUI::RenderViewCreated(RenderViewHost* render_view_host) {
   SetCommandLineString(render_view_host);
 }
 
 void OptionsUI::RenderViewReused(RenderViewHost* render_view_host) {
   SetCommandLineString(render_view_host);
 }
 
-void OptionsUI::DidBecomeActiveForReusedRenderView() {
-  // When the renderer is re-used (e.g., for back/forward navigation within
-  // options), the handlers are torn down and rebuilt, so are no longer
-  // initialized, but the web page's DOM may remain intact, in which case onload
-  // won't fire to initilize the handlers. To make sure initialization always
-  // happens, call reinitializeCore (which is a no-op unless the DOM was already
-  // initialized).
-  web_ui()->CallJavascriptFunction("OptionsPage.reinitializeCore");
-}
-
 // static
 void OptionsUI::ProcessAutocompleteSuggestions(
       const AutocompleteResult& autocompleteResult,
       ListValue * const suggestions) {
   for (size_t i = 0; i < autocompleteResult.size(); ++i) {
     const AutocompleteMatch& match = autocompleteResult.match_at(i);
     AutocompleteMatch::Type type = match.type;
     if (type != AutocompleteMatch::HISTORY_URL &&
         type != AutocompleteMatch::HISTORY_TITLE &&
         type != AutocompleteMatch::HISTORY_BODY &&
@@ skipping 11 matching lines @@
 // static
 RefCountedMemory* OptionsUI::GetFaviconResourceBytes() {
   return ResourceBundle::GetSharedInstance().
       LoadDataResourceBytes(IDR_SETTINGS_FAVICON);
 }
 
 void OptionsUI::InitializeHandlers() {
   Profile* profile = Profile::FromWebUI(web_ui());
   DCHECK(!profile->IsOffTheRecord() || Profile::IsGuestSession());
 
-  // The reinitialize call from DidBecomeActiveForReusedRenderView end up being
-  // delivered after a new web page DOM has been brought up in an existing
-  // renderer (due to IPC delays), causing this method to be called twice. If
-  // that happens, ignore the second call.
+  // A new web page DOM has been brought up in an existing renderer, causing
+  // this method to be called twice. If that happens, ignore the second call.
   if (!initialized_handlers_) {
     for (size_t i = 0; i < handlers_.size(); ++i)
       handlers_[i]->InitializeHandler();
     initialized_handlers_ = true;
+
+#if defined(OS_CHROMEOS)
+    pointer_device_observer_->Init();
+#endif
   }
 
   // Always initialize the page as when handlers are left over we still need to
   // do various things like show/hide sections and send data to the Javascript.
   for (size_t i = 0; i < handlers_.size(); ++i)
     handlers_[i]->InitializePage();
-
-#if defined(OS_CHROMEOS)
-  pointer_device_observer_->Init();
-#endif
 }
 
 void OptionsUI::AddOptionsPageUIHandler(DictionaryValue* localized_strings,
                                         OptionsPageUIHandler* handler_raw) {
   scoped_ptr<OptionsPageUIHandler> handler(handler_raw);
   DCHECK(handler.get());
   // Add only if handler's service is enabled.
   if (handler->IsEnabled()) {
     // Add handler to the list and also pass the ownership.
     web_ui()->AddMessageHandler(handler.release());
@@ skipping 10 matching lines @@
       WideToASCII(CommandLine::ForCurrentProcess()->GetCommandLineString());
 #else
   command_line_string =
       CommandLine::ForCurrentProcess()->GetCommandLineString();
 #endif
 
   render_view_host->SetWebUIProperty("commandLineString", command_line_string);
 }
 
 }  // namespace options2