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 4e3d14f1c59722d8280c92501770142e18220ca3..39d606eac8a7383a5fe9f817cac3a6b2e1166a97 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -581,6 +581,18 @@ 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;
 }