Add a document phase for calculating paint properties

third_party/WebKit/Source/core/dom/DocumentLifecycle.h

Index: third_party/WebKit/Source/core/dom/DocumentLifecycle.h
diff --git a/third_party/WebKit/Source/core/dom/DocumentLifecycle.h b/third_party/WebKit/Source/core/dom/DocumentLifecycle.h
index fe20cc9e30527e4b505983631eba5fd9aeb7223d..fbb48c5fad6a69a0ab6eba7ed14fd08d31d1b49f 100644
--- a/third_party/WebKit/Source/core/dom/DocumentLifecycle.h
+++ b/third_party/WebKit/Source/core/dom/DocumentLifecycle.h
@@ -67,6 +67,10 @@ public:
         InPaintInvalidation,
         PaintInvalidationClean,
 
+        // When RuntimeEnabledFeatures::slimmingPaintV2Enabled.
+        InCalcPaintProps,
+        CalcPaintPropsClean,

[esprehn, 2015/10/01 09:00:08]

We don't generally abbreviate in blink, this should be CalculatePaintProperties
(just like the method name)

[esprehn, 2015/10/01 09:05:06]

I guess we use Calc and Recalc in other parts of the code, but Props is very
weird in blink.

+
         // When RuntimeEnabledFeatures::slimmingPaintSynchronizedPaintingEnabled
         // (implied by slimmingPaintV2Enabled).
         InPaint,
@@ -170,6 +174,7 @@ inline bool DocumentLifecycle::stateAllowsTreeMutations() const
     return m_state != InStyleRecalc
         && m_state != InPerformLayout
         && m_state != InCompositingUpdate
+        && m_state != InCalcPaintProps
         && m_state != InPaint
         && m_state != InCompositingForSlimmingPaintV2;
 }
@@ -194,6 +199,7 @@ inline bool DocumentLifecycle::stateAllowsDetach() const
         || m_state == LayoutClean
         || m_state == CompositingClean
         || m_state == PaintInvalidationClean
+        || m_state == CalcPaintPropsClean
         || m_state == PaintClean
         || m_state == CompositingForSlimmingPaintV2Clean
         || m_state == Stopping;
@@ -204,6 +210,7 @@ inline bool DocumentLifecycle::stateAllowsLayoutInvalidation() const
     return m_state != InPerformLayout
         && m_state != InCompositingUpdate
         && m_state != InPaintInvalidation
+        && m_state != InCalcPaintProps
         && m_state != InPaint
         && m_state != InCompositingForSlimmingPaintV2;
 }