Implement signin using webview

extensions/browser/api/web_request/web_request_api_helpers.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 "extensions/browser/api/web_request/web_request_api_helpers.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/bind.h"
@@ skipping 1188 matching lines @@
     scoped_refptr<const extensions::Extension> extension) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   content::BrowserContext* browser_context =
       reinterpret_cast<content::BrowserContext*>(browser_context_id);
   if (!extensions::ExtensionsBrowserClient::Get()->IsValidContext(
       browser_context))
     return;
 
   extensions::RuntimeData* runtime_data =
       extensions::ExtensionSystem::Get(browser_context)->runtime_data();
-  if (runtime_data->HasUsedWebRequest(extension.get()))
-    return;
-  runtime_data->SetHasUsedWebRequest(extension.get(), true);
+  if (extension) {
+    if (runtime_data->HasUsedWebRequest(extension.get()))
+      return;
+    runtime_data->SetHasUsedWebRequest(extension.get(), true);

[Fady Samuel, 2014/10/21 21:32:57]

What's going on here? I'm confused.

[guohui, 2014/10/22 15:35:33]

lets continue discussion in the other cl
https://codereview.chromium.org/670173002/.

+  }
 
   for (content::RenderProcessHost::iterator it =
            content::RenderProcessHost::AllHostsIterator();
        !it.IsAtEnd(); it.Advance()) {
     content::RenderProcessHost* host = it.GetCurrentValue();
     if (host->GetBrowserContext() == browser_context)
       SendExtensionWebRequestStatusToHost(host);
   }
 }
 
@@ skipping 58 matching lines @@
       std::find(kResourceTypeStrings,
                 kResourceTypeStrings + kResourceTypeStringsLength,
                 type_str);
   if (iter == (kResourceTypeStrings + kResourceTypeStringsLength))
     return false;
   *type = kResourceTypeValues[iter - kResourceTypeStrings];
   return true;
 }
 
 }  // namespace extension_web_request_api_helpers