Propagate resource-triggered repaints to text node children of <text>

Source/core/layout/PaintInvalidationState.cpp

Index: Source/core/layout/PaintInvalidationState.cpp
diff --git a/Source/core/layout/PaintInvalidationState.cpp b/Source/core/layout/PaintInvalidationState.cpp
index 753e81fdc8a18030eafb30e7359c408144417704..fa114a411d4221720d87eb2abe90938fe693ce9e 100644
--- a/Source/core/layout/PaintInvalidationState.cpp
+++ b/Source/core/layout/PaintInvalidationState.cpp
@@ -16,7 +16,7 @@ namespace blink {
 PaintInvalidationState::PaintInvalidationState(const LayoutView& layoutView, Vector<LayoutObject*>& pendingDelayedPaintInvalidations, PaintInvalidationState* ownerPaintInvalidationState)
     : m_clipped(false)
     , m_cachedOffsetsEnabled(true)
-    , m_ancestorHadPaintInvalidationForLocationChange(false)
+    , m_forcedSubtreeInvalidationWithinContainer(false)
     , m_paintInvalidationContainer(*layoutView.containerForPaintInvalidation())
     , m_pendingDelayedPaintInvalidations(pendingDelayedPaintInvalidations)
 {
@@ -27,8 +27,8 @@ PaintInvalidationState::PaintInvalidationState(const LayoutView& layoutView, Vec
             m_cachedOffsetsEnabled = false;
             return;
         }
-        if (ownerPaintInvalidationState && ownerPaintInvalidationState->m_ancestorHadPaintInvalidationForLocationChange)
-            m_ancestorHadPaintInvalidationForLocationChange = true;
+        if (ownerPaintInvalidationState && ownerPaintInvalidationState->m_forcedSubtreeInvalidationWithinContainer)
+            m_forcedSubtreeInvalidationWithinContainer = true;
         FloatPoint point = layoutView.localToContainerPoint(FloatPoint(), &m_paintInvalidationContainer, TraverseDocumentBoundaries);
         m_paintOffset = LayoutSize(point.x(), point.y());
     }
@@ -40,7 +40,7 @@ PaintInvalidationState::PaintInvalidationState(const LayoutView& layoutView, Vec
 PaintInvalidationState::PaintInvalidationState(PaintInvalidationState& next, LayoutBoxModelObject& layoutObject, const LayoutBoxModelObject& paintInvalidationContainer)
     : m_clipped(false)
     , m_cachedOffsetsEnabled(true)
-    , m_ancestorHadPaintInvalidationForLocationChange(next.m_ancestorHadPaintInvalidationForLocationChange)
+    , m_forcedSubtreeInvalidationWithinContainer(next.m_forcedSubtreeInvalidationWithinContainer)
     , m_paintInvalidationContainer(paintInvalidationContainer)
     , m_pendingDelayedPaintInvalidations(next.pendingDelayedPaintInvalidationTargets())
 {
@@ -52,9 +52,10 @@ PaintInvalidationState::PaintInvalidationState(PaintInvalidationState& next, Lay
         m_cachedOffsetsEnabled = false;
     if (establishesPaintInvalidationContainer) {
         // When we hit a new paint invalidation container, we don't need to
-        // continue forcing a check for paint invalidation because movement
-        // from our parents will just move the whole invalidation container.
-        m_ancestorHadPaintInvalidationForLocationChange = false;
+        // continue forcing a check for paint invalidation, since we're
+        // descending into a different invalidation container. (For instance if
+        // our parents were moved, the entire container will just move.)
+        m_forcedSubtreeInvalidationWithinContainer = false;
     } else {
         if (m_cachedOffsetsEnabled) {
             if (fixed) {
@@ -96,7 +97,7 @@ PaintInvalidationState::PaintInvalidationState(PaintInvalidationState& next, Lay
 PaintInvalidationState::PaintInvalidationState(PaintInvalidationState& next, const LayoutSVGModelObject& layoutObject)
     : m_clipped(next.m_clipped)
     , m_cachedOffsetsEnabled(next.m_cachedOffsetsEnabled)
-    , m_ancestorHadPaintInvalidationForLocationChange(next.m_ancestorHadPaintInvalidationForLocationChange)
+    , m_forcedSubtreeInvalidationWithinContainer(next.m_forcedSubtreeInvalidationWithinContainer)
     , m_clipRect(next.m_clipRect)
     , m_paintOffset(next.m_paintOffset)
     , m_paintInvalidationContainer(next.m_paintInvalidationContainer)