| // Copyright 2017 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 CONTENT_COMMON_FRAME_MESSAGES_FORWARD_H_ |
| #define CONTENT_COMMON_FRAME_MESSAGES_FORWARD_H_ |
| |
| // Forward-declaration for FrameHostMsg_DidCommitProvisionalLoad_Params, which |
| // is typemapped to a Mojo [Native] type used by content::mojom::FrameHost. This |
| // means that the generated header for mojom::FrameHost requires (at least) a |
| // forward declaration of the legacy IPC struct type. |
| // |
| // Including content/common/frame_messages.h in the generated header for |
| // mojom::FrameHost is, however, not possible because legacy IPC struct type |
| // definition headers must be included exactly once in each translation unit |
| // using them, so any .cc files directly/indirectly including frame_messages.h |
| // could no longer include the generated header for mojom::FrameHost. Hence the |
| // generated header for mojom::FrameHost does not include frame_messages.h, but |
| // instead includes the forward-declaration below. |
| // |
| // TODO(https://crbug.com/729021): Eventually convert this legacy IPC struct to |
| // a proper Mojo type. |
| struct FrameHostMsg_DidCommitProvisionalLoad_Params; |
| |
| #endif // CONTENT_COMMON_FRAME_MESSAGES_FORWARD_H_ |
