Remove Downcasting RVContextMenuBase in ContextMenuDeleagate implementations.

chrome/browser/ui/views/renderer_context_menu/render_view_context_menu_views.cc

Index: chrome/browser/ui/views/renderer_context_menu/render_view_context_menu_views.cc
diff --git a/chrome/browser/ui/views/renderer_context_menu/render_view_context_menu_views.cc b/chrome/browser/ui/views/renderer_context_menu/render_view_context_menu_views.cc
index c841763ce6da1666ae40fe96a4afcf175997b921..07ca4e1da77021ce90456fee96e04c34917b65f5 100644
--- a/chrome/browser/ui/views/renderer_context_menu/render_view_context_menu_views.cc
+++ b/chrome/browser/ui/views/renderer_context_menu/render_view_context_menu_views.cc
@@ -10,10 +10,14 @@
 #include "chrome/grit/generated_resources.h"
 #include "components/renderer_context_menu/views/toolkit_delegate_views.h"
 #include "content/public/browser/render_view_host.h"
+#include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
+#include "ui/aura/client/screen_position_client.h"
+#include "ui/aura/window.h"
 #include "ui/base/accelerators/accelerator.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/events/keycodes/keyboard_codes.h"
+#include "ui/views/widget/widget.h"
 
 using content::WebContents;
 
@@ -167,3 +171,48 @@ void RenderViewContextMenuViews::AppendPlatformEditableItems() {
       l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_WRITING_DIRECTION_MENU),
       &bidi_submenu_model_);
 }
+
+void RenderViewContextMenuViews::Show() {
+  // Menus need a Widget to work. If we're not the active tab we won't
+  // necessarily be in a widget.
+  views::Widget* top_level_widget = GetTopLevelWidget();
+  if (!top_level_widget)
+    return;
+
+  // Don't show empty menus.
+  if (menu_model().GetItemCount() == 0)
+    return;
+
+  gfx::Point screen_point(params().x, params().y);
+
+  // Convert from target window coordinates to root window coordinates.
+  aura::Window* target_window = GetActiveNativeView();
+  aura::Window* root_window = target_window->GetRootWindow();
+  aura::client::ScreenPositionClient* screen_position_client =
+      aura::client::GetScreenPositionClient(root_window);
+  if (screen_position_client) {
+    screen_position_client->ConvertPointToScreen(target_window, &screen_point);
+  }
+  // Enable recursive tasks on the message loop so we can get updates while
+  // the context menu is being displayed.
+  base::MessageLoop::ScopedNestableTaskAllower allow(
+      base::MessageLoop::current());
+  RunMenuAt(top_level_widget, screen_point, params().source_type);
+}
+
+views::Widget* RenderViewContextMenuViews::GetTopLevelWidget() {
+  return views::Widget::GetTopLevelWidgetForNativeView(GetActiveNativeView());
+}
+
+aura::Window* RenderViewContextMenuViews::GetActiveNativeView() {
+  WebContents* web_contents =
+      WebContents::FromRenderFrameHost(GetRenderFrameHost());
+  if (!web_contents) {
+    LOG(ERROR) << "RenderViewContextMenuViews::Show, couldn't find WebContents";
+    return NULL;
+  }
+  return web_contents->GetFullscreenRenderWidgetHostView()
+             ? web_contents->GetFullscreenRenderWidgetHostView()
+                   ->GetNativeView()
+             : web_contents->GetNativeView();
+}