[not for review] Add Draw entries to window Performance Timeline

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index 7953fe0d40d6ba63f7c95b40434a740680f628e8..12d772c2df18c169a5363fd341ea73ac8f7032f9 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -80,10 +80,13 @@
 #include "core/page/ScopedPageLoadDeferrer.h"
 #include "core/page/TouchDisambiguation.h"
 #include "core/rendering/FastTextAutosizer.h"
+#include "core/rendering/RenderGeometryMap.h"
 #include "core/rendering/RenderView.h"
 #include "core/rendering/RenderWidget.h"
 #include "core/rendering/TextAutosizer.h"
+#include "core/rendering/compositing/CompositedLayerMapping.h"
 #include "core/rendering/compositing/RenderLayerCompositor.h"
+#include "core/timing/Performance.h"
 #include "modules/device_orientation/DeviceOrientationInspectorAgent.h"
 #include "modules/encryptedmedia/MediaKeysController.h"
 #include "modules/filesystem/InspectorFileSystemAgent.h"
@@ -122,11 +125,13 @@
 #include "public/web/WebActiveWheelFlingParameters.h"
 #include "public/web/WebAutofillClient.h"
 #include "public/web/WebBeginFrameArgs.h"
+#include "public/web/WebFrame.h"
 #include "public/web/WebFrameClient.h"
 #include "public/web/WebHitTestResult.h"
 #include "public/web/WebInputElement.h"
 #include "public/web/WebMediaPlayerAction.h"
 #include "public/web/WebNode.h"
+#include "public/web/WebPerformance.h"
 #include "public/web/WebPlugin.h"
 #include "public/web/WebPluginAction.h"
 #include "public/web/WebRange.h"
@@ -1758,6 +1763,63 @@ void WebViewImpl::beginFrame(const WebBeginFrameArgs& frameTime)
     }
 }
 
+static void findDrawFrameRequestRects(Page* page)
+{
+    typedef WTF::HashMap<const GraphicsLayer*,
+        std::vector<std::pair<int64_t, WebRect> > >
+        GraphicsLayerDrawRects;
+
+    GraphicsLayerDrawRects glRects;
+
+    for (Frame* frame = page ? page->mainFrame() : 0; frame;
+        frame = frame->tree().traverseNext()) {
+
+        if (!frame->isLocalFrame())
+            continue;
+
+        LocalFrame* localframe = toLocalFrame(frame);
+        Document* document = localframe->document();
+        HTMLFrameOwnerElement* ownerElement = document->ownerElement();
+
+        const GraphicsLayer* graphicsLayer;
+
+        // Find frame's rect in graphics layer space
+        LayoutRect rect =
+            localframe->contentRenderer()->rectForPaintInvalidation();
+
+        if (document->renderView()->enclosingLayer()->compositingState()
+            == PaintsIntoOwnBacking || !ownerElement) {
+            graphicsLayer = document->renderView()->enclosingLayer()
+                ->enclosingLayerForPaintInvalidationCrossingFrameBoundaries()
+                ->graphicsLayerBacking();
+        } else {
+            graphicsLayer = ownerElement->renderer()->enclosingLayer()
+                ->enclosingLayerForPaintInvalidationCrossingFrameBoundaries()
+                ->graphicsLayerBacking();
+
+            RenderLayer::mapRectToPaintInvalidationBacking(
+                ownerElement->renderer(),
+                ownerElement->renderer()->containerForPaintInvalidation(),
+                rect);
+        }
+
+        GraphicsLayerDrawRects::iterator glIter = glRects.find(graphicsLayer);
+        std::vector<std::pair<int64_t, WebRect> > *glVector;
+        if (glIter == glRects.end()) {
+            glVector = &glRects.add(graphicsLayer,
+                std::vector<std::pair<int64_t, WebRect> >()).storedValue->value;
+        } else {
+            glVector = &glIter->value;
+        }
+        glVector->push_back(std::make_pair(frame->frameID(), enclosingIntRect(rect)));
+    }
+
+    for (GraphicsLayerDrawRects::const_iterator iter = glRects.begin(); iter != glRects.end(); ++iter) {
+        const GraphicsLayer* graphicsLayer = iter->key;
+        graphicsLayer->platformLayer()->setDrawFrameRequestRects(iter->value);
+    }
+}
+
 void WebViewImpl::layout()
 {
     TRACE_EVENT0("blink", "WebViewImpl::layout");
@@ -1770,6 +1832,8 @@ void WebViewImpl::layout()
     for (size_t i = 0; i < m_linkHighlights.size(); ++i)
         m_linkHighlights[i]->updateGeometry();
 
+    findDrawFrameRequestRects(m_page.get());
+
     if (m_devToolsAgent)
         m_devToolsAgent->didLayout();
 }
@@ -4114,6 +4178,29 @@ void WebViewImpl::applyScrollAndScale(const WebSize& scrollDelta, float pageScal
     }
 }
 
+void WebViewImpl::recordDrawTiming(int64_t FrameId, const WebVector<std::pair<int, double> >& draws)
+{
+    if (!mainFrameImpl() || !mainFrameImpl()->frameView())
+        return;
+
+    Frame* frame = m_page ? m_page->mainFrame() : 0;
+
+    while (frame && frame->frameID() != FrameId) {
+        frame = frame->tree().traverseNext();
+    }
+
+    if (!frame)
+        return; // ASSERT? Other way to report error?
+
+    ASSERT(frame->isLocalFrame());
+
+    WebCore::LocalDOMWindow* domWindow = toLocalFrame(frame)->domWindow();
+    WebCore::Performance& performance = domWindow->performance();
+    for (size_t i = 0; i < draws.size(); ++i) {
+        performance.addDrawTiming(domWindow->document(), draws[i].first, draws[i].second);
+    }
+}
+
 void WebViewImpl::updateLayerTreeViewport()
 {
     if (!page() || !m_layerTreeView)