Fix for Incomplete context menu shown in PDF.

components/renderer_context_menu/render_view_context_menu_base.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/renderer_context_menu/render_view_context_menu_base.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.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 "content/public/common/menu_item.h"
+#if defined(ENABLE_EXTENSIONS)
+#include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.h"
+#endif
 #include "third_party/WebKit/public/web/WebContextMenuData.h"
 
 using blink::WebContextMenuData;
 using blink::WebString;
 using blink::WebURL;
 using content::BrowserContext;
 using content::OpenURLParams;
 using content::RenderFrameHost;
 using content::RenderViewHost;
 using content::WebContents;
@@ skipping 91 matching lines @@
             submenu);
         break;
       }
       default:
         NOTREACHED();
         break;
     }
   }
 }
 
+content::WebContents* GetWebContentsToUse(content::WebContents* web_contents) {
+// If we're viewing in a MimeHandlerViewGuest, use its embedder WebContents.
+#if defined(ENABLE_EXTENSIONS)
+  auto guest_view =
+      extensions::MimeHandlerViewGuest::FromWebContents(web_contents);
+  if (guest_view)
+    return guest_view->embedder_web_contents();
+#endif
+  return web_contents;
+}
+
 }  // namespace
 
 // static
 void RenderViewContextMenuBase::SetContentCustomCommandIdRange(
     int first, int last) {
   // The range is inclusive.
   content_context_custom_first = first;
   content_context_custom_last = last;
 }
 
 // static
 const size_t RenderViewContextMenuBase::kMaxSelectionTextLength = 50;
 
 // static
 int RenderViewContextMenuBase::ConvertToContentCustomCommandId(int id) {
   return content_context_custom_first + id;
 }
 
 // static
 bool RenderViewContextMenuBase::IsContentCustomCommandId(int id) {
   return id >= content_context_custom_first &&
          id <= content_context_custom_last;
 }
 
 RenderViewContextMenuBase::RenderViewContextMenuBase(
     content::RenderFrameHost* render_frame_host,
     const content::ContextMenuParams& params)
     : params_(params),
       source_web_contents_(WebContents::FromRenderFrameHost(render_frame_host)),
+      embedded_web_contents_(GetWebContentsToUse(source_web_contents_)),
       browser_context_(source_web_contents_->GetBrowserContext()),
       menu_model_(this),
       render_frame_id_(render_frame_host->GetRoutingID()),
       command_executed_(false),
       render_process_id_(render_frame_host->GetProcess()->GetID()) {
 }
 
 RenderViewContextMenuBase::~RenderViewContextMenuBase() {
 }
 
@@ skipping 212 matching lines @@
 }
 
 bool RenderViewContextMenuBase::IsCustomItemChecked(int id) const {
   return IsCustomItemCheckedInternal(params_.custom_items, id);
 }
 
 bool RenderViewContextMenuBase::IsCustomItemEnabled(int id) const {
   return IsCustomItemEnabledInternal(params_.custom_items, id);
 }