Remove 'enable lazy background pages' from about:flags

R=aa
BUG=100351
TEST=


Review URL: http://codereview.chromium.org/8353040

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@107774 0039d316-1c4b-4281-b951-d872f2087c98

chrome/app/generated_resources.grd

@@ -4556,12 +4556,6 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_CRXLESS_WEB_APPS_DESCRIPTION" desc="Description of the CRX-less web apps lab">
         Enables support for installing Chrome apps that are deployed using a manifest file on a webpage, rather than by packaging the manifest and icons into a crx file.
       </message>
-      <message name="IDS_FLAGS_LAZY_BACKGROUND_PAGES_NAME" desc="Title of the flag to enable lazy loading of extension background pages.">
-        Lazy Background Pages
-      </message>
-      <message name="IDS_FLAGS_LAZY_BACKGROUND_PAGES_DESCRIPTION" desc="Description of the flag to enable lazy loading of extension background pages.">
-        Enables some extension background pages to be loaded when they are needed rather than when the extensions are first loaded.
-      </message>
       <message name="IDS_FLAGS_CONFLICTS_CHECK_NAME" desc="Title of the run conflicts check flag">
         Check for known conflicts with 3rd party modules.
       </message>

chrome/browser/about_flags.cc

@@ -127,13 +127,6 @@ const Experiment kExperiments[] = {
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kEnableCrxlessWebApps)
   },
-  {
-    "lazy-background-pages",
-    IDS_FLAGS_LAZY_BACKGROUND_PAGES_NAME,
-    IDS_FLAGS_LAZY_BACKGROUND_PAGES_DESCRIPTION,
-    kOsAll,
-    SINGLE_VALUE_TYPE(switches::kEnableLazyBackgroundPages)
-  },
   {
     "ignore-gpu-blacklist",
     IDS_FLAGS_IGNORE_GPU_BLACKLIST_NAME,