Support uninstalling ARC app from Chrome launcher

chrome/browser/ui/app_list/arc/arc_app_utils.h

Index: chrome/browser/ui/app_list/arc/arc_app_utils.h
diff --git a/chrome/browser/ui/app_list/arc/arc_app_utils.h b/chrome/browser/ui/app_list/arc/arc_app_utils.h
index bd9ba934fcd8f61dce07b8f925aedac90717ba3b..1f1cabea5b33e6c071319343f7b5087332c7105c 100644
--- a/chrome/browser/ui/app_list/arc/arc_app_utils.h
+++ b/chrome/browser/ui/app_list/arc/arc_app_utils.h
@@ -14,8 +14,13 @@ namespace content {
 class BrowserContext;
 }
 
+namespace mojo {
+class String;
+}
+
 namespace arc {
 using CanHandleResolutionCallback = base::Callback<void(bool)>;
+using UninstallAppCallback = base::Callback<void(const mojo::String&)>;
 }
 
 namespace arc {
@@ -29,7 +34,12 @@ bool LaunchApp(content::BrowserContext* context, const std::string& app_id);
 bool CanHandleResolution(content::BrowserContext* context,
     const std::string& app_id,
     const gfx::Rect& rect,
-    const CanHandleResolutionCallback callback);
+    const CanHandleResolutionCallback& callback);
+
+// Uninstalls the package in ARC.
+bool UninstallApp(const std::string& package_name,
+                  const UninstallAppCallback& callback);
+void OnUninstallAppResponse(const mojo::String& error_message);
 
 }  // namespace arc