whitelist hangouts.google.com for nacl plugin loading.

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index 3d815b12700a504dff8e384297d232fe6a98bf1a..304c11459e20a934eda659c51b6dc2471ce117cf 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -991,6 +991,8 @@ bool ChromeContentRendererClient::IsNaClAllowed(
        base::EndsWith(app_url_host, "plus.google.com",
                       base::CompareCase::INSENSITIVE_ASCII) ||
        base::EndsWith(app_url_host, "plus.sandbox.google.com",
+                      base::CompareCase::INSENSITIVE_ASCII) ||
+       base::EndsWith(app_url_host, "hangouts.google.com",
                       base::CompareCase::INSENSITIVE_ASCII)) &&
       // The manifest must be loaded from the host's FileSystem.
       (manifest_fs_host == app_url_host);