Add the ability to focus a window to chrome.window.update().

chrome/browser/extensions/extension_tabs_module.cc

Index: chrome/browser/extensions/extension_tabs_module.cc
diff --git a/chrome/browser/extensions/extension_tabs_module.cc b/chrome/browser/extensions/extension_tabs_module.cc
index aac608194ce564d83b05ed54d75c43481637d76e..a6005415a6d5c20e1c9d300286bb60ec6ee72f1d 100644
--- a/chrome/browser/extensions/extension_tabs_module.cc
+++ b/chrome/browser/extensions/extension_tabs_module.cc
@@ -387,7 +387,15 @@ bool UpdateWindowFunction::RunImpl() {
   }
 
   browser->window()->SetBounds(bounds);
-  // TODO(rafaelw): Support |focused|.
+
+  if (update_props->HasKey(keys::kFocusedKey)) {
+    bool focused = false;
+    EXTENSION_FUNCTION_VALIDATE(update_props->GetBoolean(keys::kFocusedKey,
+                                                         &focused));
+    if (focused)
+      browser->window()->Activate();
+  }
+
   result_.reset(ExtensionTabUtil::CreateWindowValue(browser, false));
 
   return true;