Split cc/base into separate GN source_set and clean deps

//cc/base is intended to be a set of low level utilities used by the rest
of cc (and consumers of cc) and as such shouldn't contain dependencies
on other parts of //cc. This splits the //cc/base files into a separate
GN source_set so 'gn check' can examine dependencies and moves a few
types that have dependencies on other types out:

swap_promise is conceptually about swapping frames, so it goes into
cc/output

*swap_promise_monitor is dealing with swaps on trees, so it goes in
cc/trees

R=danakj@chromium.org

Review URL: https://codereview.chromium.org/1002073002

Cr-Commit-Position: refs/heads/master@{#320796}

1 files changed, 97 insertions, 0 deletions

diff --git a/cc/trees/latency_info_swap_promise_monitor.cc b/cc/trees/latency_info_swap_promise_monitor.cc
new file mode 100644
index 0000000..10d9380
--- /dev/null
+++ b/cc/trees/latency_info_swap_promise_monitor.cc
@@ -0,0 +1,97 @@
+// Copyright 2013 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 "cc/trees/latency_info_swap_promise_monitor.h"
+
+#include "base/threading/platform_thread.h"
+#include "cc/output/latency_info_swap_promise.h"
+#include "cc/trees/layer_tree_host.h"
+#include "cc/trees/layer_tree_host_impl.h"
+#include "cc/trees/layer_tree_impl.h"
+
+namespace {
+
+bool AddRenderingScheduledComponent(ui::LatencyInfo* latency_info,
+                                    bool on_main) {
+  ui::LatencyComponentType type =
+      on_main ? ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_MAIN_COMPONENT
+              : ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_IMPL_COMPONENT;
+  if (latency_info->FindLatency(type, 0, nullptr))
+    return false;
+  latency_info->AddLatencyNumber(type, 0, 0);
+  return true;
+}
+
+bool AddForwardingScrollUpdateToMainComponent(ui::LatencyInfo* latency_info) {
+  if (latency_info->FindLatency(
+          ui::INPUT_EVENT_LATENCY_FORWARD_SCROLL_UPDATE_TO_MAIN_COMPONENT, 0,
+          nullptr))
+    return false;
+  latency_info->AddLatencyNumber(
+      ui::INPUT_EVENT_LATENCY_FORWARD_SCROLL_UPDATE_TO_MAIN_COMPONENT, 0,
+      latency_info->trace_id);
+  return true;
+}
+
+}  // namespace
+
+namespace cc {
+
+LatencyInfoSwapPromiseMonitor::LatencyInfoSwapPromiseMonitor(
+    ui::LatencyInfo* latency,
+    LayerTreeHost* layer_tree_host,
+    LayerTreeHostImpl* layer_tree_host_impl)
+    : SwapPromiseMonitor(layer_tree_host, layer_tree_host_impl),
+      latency_(latency) {
+}
+
+LatencyInfoSwapPromiseMonitor::~LatencyInfoSwapPromiseMonitor() {
+}
+
+void LatencyInfoSwapPromiseMonitor::OnSetNeedsCommitOnMain() {
+  if (AddRenderingScheduledComponent(latency_, true /* on_main */)) {
+    scoped_ptr<SwapPromise> swap_promise(new LatencyInfoSwapPromise(*latency_));
+    layer_tree_host_->QueueSwapPromise(swap_promise.Pass());
+  }
+}
+
+void LatencyInfoSwapPromiseMonitor::OnSetNeedsRedrawOnImpl() {
+  if (AddRenderingScheduledComponent(latency_, false /* on_main */)) {
+    scoped_ptr<SwapPromise> swap_promise(new LatencyInfoSwapPromise(*latency_));
+    layer_tree_host_impl_->active_tree()->QueueSwapPromise(swap_promise.Pass());
+  }
+}
+
+void LatencyInfoSwapPromiseMonitor::OnForwardScrollUpdateToMainThreadOnImpl() {
+  if (AddForwardingScrollUpdateToMainComponent(latency_)) {
+    int64 new_sequence_number = 0;
+    for (ui::LatencyInfo::LatencyMap::const_iterator it =
+             latency_->latency_components.begin();
+         it != latency_->latency_components.end(); ++it) {
+      if (it->first.first == ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT) {
+        new_sequence_number =
+            (static_cast<int64>(base::PlatformThread::CurrentId()) << 32) |
+            (it->second.sequence_number & 0xffffffff);
+        DCHECK(new_sequence_number != it->second.sequence_number);
+        break;
+      }
+    }
+    if (!new_sequence_number)
+      return;
+    ui::LatencyInfo new_latency;
+    new_latency.AddLatencyNumber(
+        ui::INPUT_EVENT_LATENCY_BEGIN_SCROLL_UPDATE_MAIN_COMPONENT, 0,
+        new_sequence_number);
+    new_latency.TraceEventType("ScrollUpdate");
+    new_latency.CopyLatencyFrom(
+        *latency_,
+        ui::INPUT_EVENT_LATENCY_FORWARD_SCROLL_UPDATE_TO_MAIN_COMPONENT);
+    scoped_ptr<SwapPromise> swap_promise(
+        new LatencyInfoSwapPromise(new_latency));
+    layer_tree_host_impl_->QueueSwapPromiseForMainThreadScrollUpdate(
+        swap_promise.Pass());
+  }
+}
+
+}  // namespace cc