Added separate tabs for apps / extensions in dev_tools app.

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index f5b9dad334b1b47fd242d13cb590bca686aa8e4c..1006d5c236b22322224588873235bbb753b0dce7 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -5337,16 +5337,16 @@ Public Exponent (<ph name="PUBLIC_EXPONENT_NUM_BITS">$3<ex>24</ex></ph> bits):
         Close
       </message>
       <message name="IDS_APPS_DEVTOOL_LOAD_UNPACKED_BUTTON" desc="Text of the 'Load app/extension' button.">
-        Load unpacked app/extension
+        Load unpacked...
       </message>
       <message name="IDS_APPS_DEVTOOL_PACK_BUTTON" desc="Text for the 'Pack app/extension' button.">
-        Pack app/extension
+        Pack...
       </message>
       <message name="IDS_APPS_DEVTOOL_UPDATE_BUTTON" desc="Text for the 'Update app/extensions' button.">
-        Update apps/extensions now
+        Update now
       </message>
-      <message name="IDS_APPS_DEVTOOL_NONE_INSTALLED" desc="Text that lets the user know that no extensions are installed.">
-        Boo... You have no apps or extensions :-(
+      <message name="IDS_APPS_DEVTOOL_NO_APPS_INSTALLED" desc="Text that lets the user know that no apps are installed.">
+        Boo... You have no apps :-(
       </message>
       <message name="IDS_EXTENSIONS_NONE_INSTALLED_SUGGEST_GALLERY" desc="Text on next line after IDS_EXTENSIONS_NONE_INSTALLED that suggests the user look in the gallery for extensions to install.">
         Want to <ph name="BEGIN_LINK">&lt;a target="_blank" href="$1"&gt;</ph>browse the gallery<ph name="END_LINK">&lt;/a&gt;<ex>&lt;/a&gt;</ex></ph> instead?