Add a mimeHandler extension API.

extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.h

 // 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.
 
 #ifndef EXTENSIONS_BROWSER_GUEST_VIEW_MIME_HANDLER_VIEW_MIME_HANDLER_VIEW_GUEST_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_MIME_HANDLER_VIEW_MIME_HANDLER_VIEW_GUEST_H_
 
 #include "base/memory/weak_ptr.h"
 #include "extensions/browser/extension_function_dispatcher.h"
 #include "extensions/browser/guest_view/guest_view.h"
 
 namespace content {
 class WebContents;
 struct ContextMenuParams;
 struct StreamInfo;
 }  // namespace content
 
 namespace extensions {
 class MimeHandlerViewGuestDelegate;
 
 // A container for a StreamHandle and any other information necessary for a
 // MimeHandler to handle a resource stream.
 class StreamContainer {
  public:
   StreamContainer(scoped_ptr<content::StreamInfo> stream,
+                  int tab_id,
+                  int64_t expected_content_size,

[raymes, 2015/01/12 05:26:04]

I'm tempted to remove content size because I don't think it's used by anyone.
WDYT? We could add it again later.

[Sam McNally, 2015/01/12 07:13:35]

Done.

+                  bool embedded,
                   const GURL& handler_url,
                   const std::string& extension_id);
   ~StreamContainer();
 
   // Aborts the stream.
   void Abort();
 
   base::WeakPtr<StreamContainer> GetWeakPtr();
 
   const content::StreamInfo* stream_info() { return stream_.get(); }
+  bool embedded() { return embedded_; }
+  int64_t expected_content_size() { return expected_content_size_; }
+  int tab_id() { return tab_id_; }
   GURL handler_url() { return handler_url_; }
   std::string extension_id() { return extension_id_; }
 
  private:
   const scoped_ptr<content::StreamInfo> stream_;
+  const bool embedded_;
+  const int64_t expected_content_size_;
+  const int tab_id_;
   const GURL handler_url_;
   const std::string extension_id_;
 
   base::WeakPtrFactory<StreamContainer> weak_factory_;
 };
 
 class MimeHandlerViewGuest : public GuestView<MimeHandlerViewGuest>,
                              public ExtensionFunctionDispatcher::Delegate {
  public:
   static GuestViewBase* Create(content::BrowserContext* browser_context,
@@ skipping 56 matching lines @@
   scoped_ptr<ExtensionFunctionDispatcher> extension_function_dispatcher_;
   scoped_ptr<StreamContainer> stream_;
   std::string view_id_;
 
   DISALLOW_COPY_AND_ASSIGN(MimeHandlerViewGuest);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_MIME_HANDLER_VIEW_MIME_HANDLER_VIEW_GUEST_H_