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..cd423c69183e316756cb498347ff7cee2786bffd 100644
--- a/chrome/browser/ui/app_list/arc/arc_app_utils.h
+++ b/chrome/browser/ui/app_list/arc/arc_app_utils.h
@@ -14,12 +14,14 @@ namespace content {
 class BrowserContext;
 }
 
-namespace arc {
-using CanHandleResolutionCallback = base::Callback<void(bool)>;
+namespace mojo {
+class String;
 }
 
 namespace arc {
 
+using CanHandleResolutionCallback = base::Callback<void(bool)>;
+
 bool LaunchApp(content::BrowserContext* context, const std::string& app_id);
 
 // Tests if the application can use the given target resolution.
@@ -29,7 +31,10 @@ 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.
+void UninstallPackage(const std::string& package_name);
 
 }  // namespace arc