compositor-worker: cc->blink mutation plumbing

third_party/WebKit/Source/core/dom/Element.cpp

Index: third_party/WebKit/Source/core/dom/Element.cpp
diff --git a/third_party/WebKit/Source/core/dom/Element.cpp b/third_party/WebKit/Source/core/dom/Element.cpp
index 53f79f17c4adc0595dfb52e20d5efb9f1b326e54..4bc6d82496aceb63c1be4fe108ddc980686cf55f 100644
--- a/third_party/WebKit/Source/core/dom/Element.cpp
+++ b/third_party/WebKit/Source/core/dom/Element.cpp
@@ -36,6 +36,7 @@
 #include "core/SVGNames.h"
 #include "core/XMLNames.h"
 #include "core/animation/AnimationTimeline.h"
+#include "core/animation/CustomCompositorAnimations.h"
 #include "core/animation/css/CSSAnimations.h"
 #include "core/css/CSSImageValue.h"
 #include "core/css/CSSStyleSheet.h"
@@ -126,6 +127,7 @@
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/UserGestureIndicator.h"
 #include "platform/graphics/CompositorMutableProperties.h"
+#include "platform/graphics/CompositorMutation.h"
 #include "platform/scroll/ScrollableArea.h"
 #include "wtf/BitVector.h"
 #include "wtf/HashFunctions.h"
@@ -950,6 +952,13 @@ void Element::decrementCompositorProxiedProperties(uint32_t mutableProperties)
         setNeedsStyleRecalc(LocalStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::CompositorProxy));
 }
 
+void Element::updateFromCompositorMutation(const CompositorMutation& mutation)
+{
+    TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("compositor-worker"), "Element::updateFromCompositorMutation");
+    if (mutation.isOpacityMutated() || mutation.isTransformMutated())

[esprehn, 2016/03/22 21:16:49]

how do we get here with neither of those mutated?

[majidvp, 2016/03/23 22:24:53]

Scroll{Top,Left} may also be mutated. Those are synced as part of the scroll
tree sync so we don't handle them here but it is possible to get a mutations
that is neither opacity or transform. We don't filter them out at the moment.

+        ensureElementAnimations().customCompositorAnimations().applyUpdate(*this, mutation);
+}
+
 uint32_t Element::compositorMutableProperties() const
 {
     if (!hasRareData())