Hide default context menu for platform apps.

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
diff --git a/chrome/browser/ui/browser.cc b/chrome/browser/ui/browser.cc
index 13b80a3500f57bac37a24561f13b8a80c8595f3f..4806e5804a97724fcbb3a780edba568b0b2a8f6f 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -579,6 +579,18 @@ bool Browser::is_app() const {
   return !app_name_.empty();
 }
 
+const Extension* Browser::GetPlatformApp() const {
+  if (is_app()) {
+    const std::string ext_id = web_app::GetExtensionIdFromApplicationName(
+        app_name_);
+    const Extension* app =
+        profile_->GetExtensionService()->GetInstalledExtension(ext_id);
+    if (app && app->is_platform_app())
+      return app;
+  }
+  return NULL;
+}
+
 bool Browser::is_devtools() const {
   return app_name_ == DevToolsWindow::kDevToolsApp;
 }