[NOT FOR REVIEW] extensions-wm: Add experimental extension API for window management.

chrome/app/google_chrome_strings.grd

Index: chrome/app/google_chrome_strings.grd
diff --git a/chrome/app/google_chrome_strings.grd b/chrome/app/google_chrome_strings.grd
index 1568d4e8f155fcea051a7610382e145e4e28af7f..eb907c203f7817394d4a643008ad3458ec761441 100644
--- a/chrome/app/google_chrome_strings.grd
+++ b/chrome/app/google_chrome_strings.grd
@@ -643,6 +643,11 @@ For Google Chrome, processes used to display diagnostics information (such as th
         Add to Chrome
       </message>
 
+      <!-- Extension/App install dialog strings -->
+      <message name="IDS_EXTENSION_PROMPT_WARNING_WM" desc="Permission string for access to manage all of the windows.">
+        Manage all Chrome windows
+      </message>
+
       <!-- Extension alerts. -->
       <message name="IDS_EXTENSION_ALERT_ITEM_EXTERNAL" desc="A statement that an external extension has been newly installed. End users have no idea what an 'external' extension is, so we simply call them extensions. The trailing character must be a newline.">
 The extension "<ph name="EXTENSION_NAME">$1<ex>Gmail Checker</ex></ph>" has been added.