Build chrome.input.ime.* API in GN mode.

chrome/browser/extensions/api/input_ime/input_ime_api_nonchromeos.cc

Index: chrome/browser/extensions/api/input_ime/input_ime_api_nonchromeos.cc
diff --git a/chrome/browser/extensions/api/input_ime/input_ime_api_nonchromeos.cc b/chrome/browser/extensions/api/input_ime/input_ime_api_nonchromeos.cc
index 34dc1457781e56c35e666e8e9a48637ff74e5fdd..f1d92bf15c947d10abc96d649d3b3545c85b2f06 100644
--- a/chrome/browser/extensions/api/input_ime/input_ime_api_nonchromeos.cc
+++ b/chrome/browser/extensions/api/input_ime/input_ime_api_nonchromeos.cc
@@ -53,13 +53,13 @@ class ImeObserverNonChromeOS : public ui::ImeObserver {
 }  // namespace
 
 namespace extensions {
+void InputImeAPI::OnExtensionLoaded(content::BrowserContext* browser_context,
+                                    const Extension* extension) {}
 
-bool InputImeEventRouter::RegisterImeExtension(
-    const std::string& extension_id,
-    const std::vector<extensions::InputComponentInfo>& input_components) {
-  return false;
-}
+void InputImeAPI::OnExtensionUnloaded(content::BrowserContext* browser_context,
+                                      const Extension* extension,
+                                      UnloadedExtensionInfo::Reason reason) {}
 
-void InputImeEventRouter::UnregisterAllImes(const std::string& extension_id) {}
+void InputImeAPI::OnListenerAdded(const EventListenerInfo& details) {}
 
 }  // namespace extensions