cc: Delete channel abstraction between proxies.

cc/trees/channel_main.h

-// Copyright 2015 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 CC_TREES_CHANNEL_MAIN_H_
-#define CC_TREES_CHANNEL_MAIN_H_
-
-#include "cc/base/cc_export.h"
-#include "cc/base/completion_event.h"
-#include "cc/input/browser_controls_state.h"
-#include "cc/output/compositor_frame_sink.h"
-#include "cc/scheduler/begin_frame_source.h"
-#include "cc/scheduler/commit_earlyout_reason.h"
-#include "cc/trees/proxy_common.h"
-
-namespace cc {
-class LayerTreeHostInProcess;
-class LayerTreeMutator;
-
-// ChannelMain and ChannelImpl provide an abstract communication layer for
-// the main and impl side of the compositor.
-//
-// The communication sequence between the 2 sides is:
-//
-// LayerTreeHostInProcess<-->ProxyMain<-->ChannelMain
-//                                      |
-//                                      |
-//                               ChannelImpl<-->ProxyImpl<-->LayerTreeHostImpl
-
-class CC_EXPORT ChannelMain {
- public:
-  virtual ~ChannelMain() {}
-
-  // Interface for commands sent to ProxyImpl
-  virtual void UpdateBrowserControlsStateOnImpl(
-      BrowserControlsState constraints,
-      BrowserControlsState current,
-      bool animate) = 0;
-  virtual void InitializeCompositorFrameSinkOnImpl(
-      CompositorFrameSink* compositor_frame_sink) = 0;
-  virtual void InitializeMutatorOnImpl(
-      std::unique_ptr<LayerTreeMutator> mutator) = 0;
-  virtual void MainThreadHasStoppedFlingingOnImpl() = 0;
-  virtual void SetInputThrottledUntilCommitOnImpl(bool is_throttled) = 0;
-  virtual void SetDeferCommitsOnImpl(bool defer_commits) = 0;
-  virtual void SetVisibleOnImpl(bool visible) = 0;
-  virtual void ReleaseCompositorFrameSinkOnImpl(
-      CompletionEvent* completion) = 0;
-  virtual void MainFrameWillHappenOnImplForTesting(
-      CompletionEvent* completion,
-      bool* main_frame_will_happen) = 0;
-  virtual void SetNeedsRedrawOnImpl(const gfx::Rect& damage_rect) = 0;
-  virtual void SetNeedsCommitOnImpl() = 0;
-  virtual void BeginMainFrameAbortedOnImpl(
-      CommitEarlyOutReason reason,
-      base::TimeTicks main_thread_start_time,
-      std::vector<std::unique_ptr<SwapPromise>> swap_promises) = 0;
-  virtual void NotifyReadyToCommitOnImpl(
-      CompletionEvent* completion,
-      LayerTreeHostInProcess* layer_tree_host,
-      base::TimeTicks main_thread_start_time,
-      bool hold_commit_for_activation) = 0;
-
-  // Must be called before using the channel.
-  virtual void SynchronouslyInitializeImpl(
-      LayerTreeHostInProcess* layer_tree_host) = 0;
-
-  // Must be called before deleting the channel.
-  virtual void SynchronouslyCloseImpl() = 0;
-};
-
-}  // namespace cc
-
-#endif  // CC_TREES_CHANNEL_MAIN_H_