Enable under-invalidation checking in tests calling runAfterLayoutAndPaint()

These tests often change dom/style after a complete paint and test how
the rendering pipeline handles the changes. They are good candidate
for under-invalidation checking.

BUG=619103

Review-Url: https://codereview.chromium.org/2092953002
Cr-Commit-Position: refs/heads/master@{#403355}

third_party/WebKit/LayoutTests/TestExpectations

@@ -1138,6 +1138,11 @@ crbug.com/619103 paint/invalidation/animated-gif.html [ Pass Failure ]
 crbug.com/619103 paint/invalidation/animated-gif-background.html [ Pass Failure ]
 crbug.com/619103 paint/invalidation/animated-gif-background-offscreen.html [ Pass Failure ]
 crbug.com/619103 [ Win ] svg/text/text-viewbox-rescale.html [ Pass Failure ]
+crbug.com/619103 paint/overflow/interest-rect-change-scroll-down.html [ Failure ]
+crbug.com/619103 paint/selection/text-selection-newline-mixed-ltr-rtl.html [ Failure ]
+crbug.com/619103 paint/selection/text-selection-newline-rtl-double-linebreak.html [ Failure ]
+crbug.com/619103 virtual/rootlayerscrolls/fast/scrolling/background-paint-scrolled-out-and-in.html [ Crash Timeout ]
+crbug.com/619103 virtual/rootlayerscrolls/fast/scrolling/background-paint-scrolled.html [ Crash Timeout ]
 
 crbug.com/443596 media/sources-fallback-codecs.html [ Pass Failure ]
 

third_party/WebKit/LayoutTests/resources/run-after-layout-and-paint.js

@@ -21,6 +21,15 @@
 //       ... // some code which modifies style/layout
 //     }, true);
 
+if (window.internals) {
+    // TODO(wangxianzhu): Some spv2 tests crash with under-invalidation-checking
+    // because the extra display items between Subsequence/EndSubsequence for
+    // under-invalidation checking breaks paint chunks. Should fix this when fixing
+    // crbug.com/596983.
+    if (!internals.runtimeFlags.slimmingPaintV2Enabled)
+        internals.runtimeFlags.slimmingPaintUnderInvalidationCheckingEnabled = true;
+}
+
 function runAfterLayoutAndPaint(callback, autoNotifyDone) {
     if (!window.testRunner) {
         // For manual test. Delay 500ms to allow us to see the visual change

third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp

@@ -598,8 +598,11 @@ void GraphicsLayer::trackPaintInvalidation(const DisplayItemClient& client, cons
         return;
 
     PaintInvalidationTracking& tracking = paintInvalidationTrackingMap().add(this, PaintInvalidationTracking()).storedValue->value;
-    PaintInvalidationInfo info = { &client, client.debugName(), rect, reason };
-    tracking.trackedPaintInvalidations.append(info);
+
+    if (m_isTrackingPaintInvalidations) {
+        PaintInvalidationInfo info = { &client, client.debugName(), rect, reason };
+        tracking.trackedPaintInvalidations.append(info);
+    }
 
 #if DCHECK_IS_ON()
     if (RuntimeEnabledFeatures::slimmingPaintUnderInvalidationCheckingEnabled()) {