Move paint-related timings out of DocumentTiming

third_party/WebKit/Source/core/paint/PaintTiming.cpp

+// 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.
+
+#include "config.h"
+#include "core/paint/PaintTiming.h"
+
+#include "core/dom/Document.h"
+#include "core/loader/DocumentLoader.h"
+#include "platform/TraceEvent.h"
+#include "wtf/RawPtr.h"
+
+namespace blink {
+
+static const char kSupplementName[] = "PaintTiming";
+
+PaintTiming& PaintTiming::from(Document& document)
+{
+    PaintTiming* timing = static_cast<PaintTiming*>(WillBeHeapSupplement<Document>::from(document, kSupplementName));
+    if (!timing) {
+        timing = new PaintTiming(document);
+        WillBeHeapSupplement<Document>::provideTo(document, kSupplementName, adoptPtrWillBeNoop(timing));
+    }
+    return *timing;
+}
+
+PaintTiming::PaintTiming(Document& document)
+    : m_document(document)
+{
+}
+
+DEFINE_TRACE(PaintTiming)
+{
+    visitor->trace(m_document);
+}
+
+LocalFrame* PaintTiming::frame() const
+{
+    return m_document ? m_document->frame() : nullptr;
+}
+
+void PaintTiming::notifyPaintTimingChanged()
+{
+    if (m_document && m_document->loader())
+        m_document->loader()->didChangePerformanceTiming();
+}
+
+void PaintTiming::markFirstPaint()
+{
+    m_firstPaint = monotonicallyIncreasingTime();
+    TRACE_EVENT_MARK_WITH_TIMESTAMP1("blink.user_timing", "firstPaint", m_firstPaint, "frame", frame());
+    notifyPaintTimingChanged();
+}
+
+void PaintTiming::markFirstTextPaint()
+{
+    m_firstTextPaint = monotonicallyIncreasingTime();
+    TRACE_EVENT_MARK_WITH_TIMESTAMP1("blink.user_timing", "firstTextPaint", m_firstTextPaint, "frame", frame());
+    notifyPaintTimingChanged();
+}
+
+void PaintTiming::markFirstImagePaint()
+{
+    m_firstImagePaint = monotonicallyIncreasingTime();
+    TRACE_EVENT_MARK_WITH_TIMESTAMP1("blink.user_timing", "firstImagePaint", m_firstImagePaint, "frame", frame());
+    notifyPaintTimingChanged();
+}
+
+} // namespace blink