[compositorworker] compositor proxy mutation updates underlying layers

third_party/WebKit/Source/web/CompositorProxyClientImpl.cpp

Index: third_party/WebKit/Source/web/CompositorProxyClientImpl.cpp
diff --git a/third_party/WebKit/Source/web/CompositorProxyClientImpl.cpp b/third_party/WebKit/Source/web/CompositorProxyClientImpl.cpp
index 883114a745d01ad84833162d057786e2e661fa75..0aaa72776eb480500d0a286b14c6f0d460518e8b 100644
--- a/third_party/WebKit/Source/web/CompositorProxyClientImpl.cpp
+++ b/third_party/WebKit/Source/web/CompositorProxyClientImpl.cpp
@@ -7,6 +7,7 @@
 #include "core/dom/CompositorProxy.h"
 #include "modules/compositorworker/CompositorWorkerGlobalScope.h"
 #include "platform/TraceEvent.h"
+#include "platform/graphics/CompositorMutableStateProvider.h"
 #include "web/CompositorMutatorImpl.h"
 #include "wtf/CurrentTime.h"
 
@@ -42,7 +43,7 @@ void CompositorProxyClientImpl::requestAnimationFrame()
     m_mutator->setNeedsMutate();
 }
 
-bool CompositorProxyClientImpl::mutate(double monotonicTimeNow)
+bool CompositorProxyClientImpl::mutate(double monotonicTimeNow, CompositorMutableStateProvider* stateProvider)
 {
     if (!m_globalScope)
         return false;
@@ -51,7 +52,9 @@ bool CompositorProxyClientImpl::mutate(double monotonicTimeNow)
     if (!m_requestedAnimationFrameCallbacks)
         return false;
 
+    updateMutableStateForCompositorProxies(stateProvider);
     m_requestedAnimationFrameCallbacks = executeAnimationFrameCallbacks(monotonicTimeNow);
+    updateMutableStateForCompositorProxies(nullptr);
 
     return m_requestedAnimationFrameCallbacks;
 }
@@ -59,10 +62,18 @@ bool CompositorProxyClientImpl::mutate(double monotonicTimeNow)
 bool CompositorProxyClientImpl::executeAnimationFrameCallbacks(double monotonicTimeNow)
 {
     TRACE_EVENT0("compositor-worker", "CompositorProxyClientImpl::executeAnimationFrameCallbacks");
+
     // Convert to zero based document time in milliseconds consistent with requestAnimationFrame.
     double highResTimeMs = 1000.0 * (monotonicTimeNow - m_globalScope->timeOrigin());
-    const bool shouldReinvoke = m_globalScope->executeAnimationFrameCallbacks(highResTimeMs);
-    return shouldReinvoke;
+    return m_globalScope->executeAnimationFrameCallbacks(highResTimeMs);
+}
+
+void CompositorProxyClientImpl::updateMutableStateForCompositorProxies(CompositorMutableStateProvider* stateProvider)
+{
+    for (auto iter : m_proxies) {
+        for (CompositorProxy* proxy : *iter.value)
+            proxy->takeCompositorMutableState(stateProvider ? stateProvider->getMutableStateFor(iter.key) : nullptr);
+    }
 }
 
 void CompositorProxyClientImpl::registerCompositorProxy(CompositorProxy* proxy)