initial version of auto VK switching.

chrome/browser/extensions/extension_service.cc

Index: chrome/browser/extensions/extension_service.cc
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index a835f6a70886f0407638539606d0cc47866f14ad..51b9d242cc3b54aed150601519465bfcb4dc92ac 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -93,6 +93,8 @@
 #endif
 
 #if defined(OS_CHROMEOS) && defined(TOUCH_UI)
+#include "chrome/browser/chromeos/cros/cros_library.h"
+#include "chrome/browser/chromeos/cros/input_method_library.h"
 #include "chrome/browser/extensions/extension_input_ui_api.h"
 #endif
 
@@ -1265,6 +1267,24 @@ void ExtensionService::NotifyExtensionLoaded(const Extension* extension) {
 
   if (plugins_changed || nacl_modules_changed)
     PluginService::GetInstance()->PurgePluginListCache(false);
+
+#if defined(OS_CHROMEOS) && defined(TOUCH_UI)
+  chromeos::InputMethodLibrary* input_method_library =
+      chromeos::CrosLibrary::Get()->GetInputMethodLibrary();
+  for (std::vector<Extension::InputComponentInfo>::const_iterator component =
+           extension->input_components().begin();
+       component != extension->input_components().end();
+       ++component) {
+    if (component->type == Extension::INPUT_COMPONENT_TYPE_VIRTUAL_KEYBOARD &&
+        !component->layouts.empty()) {
+      const bool is_system =
+          !Extension::IsExternalLocation(extension->location());
+      input_method_library->RegisterVirtualKeyboard(extension->url(),
+                                                    component->layouts,
+                                                    is_system);
+    }
+  }
+#endif
 }
 
 void ExtensionService::NotifyExtensionUnloaded(