content/public/child/child_thread.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_PUBLIC_CHILD_CHILD_THREAD_H_
   6 #define CONTENT_PUBLIC_CHILD_CHILD_THREAD_H_
   7
   8 #include "content/common/content_export.h"
   9 #include "ipc/attachment_broker.h"
  10 #include "ipc/ipc_sender.h"
  11
  12 #if defined(OS_WIN)
  13 #include <windows.h>
  14 #endif
  15
  16 namespace content {
  17
  18 // An abstract base class that contains logic shared between most child
  19 // processes of the embedder.
  20 class CONTENT_EXPORT ChildThread
  21     : public IPC::Sender,
  22       virtual public IPC::SupportsAttachmentBrokering {
  23  public:
  24   // Returns the one child thread for this process.  Note that this can only be
  25   // accessed when running on the child thread itself.
  26   static ChildThread* Get();
  27
  28   ~ChildThread() override {}
  29
  30 #if defined(OS_WIN)
  31   // Request that the given font be loaded by the browser so it's cached by the
  32   // OS. Please see ChildProcessHost::PreCacheFont for details.
  33   virtual void PreCacheFont(const LOGFONT& log_font) = 0;
  34
  35   // Release cached font.
  36   virtual void ReleaseCachedFonts() = 0;
  37 #endif
  38 };
  39
  40 }  // namespace content
  41
  42 #endif  // CONTENT_PUBLIC_CHILD_CHILD_THREAD_H_