[compositorworker] compositor proxy mutation updates underlying layers

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

Index: third_party/WebKit/Source/platform/graphics/CompositorMutableStateProvider.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/CompositorMutableStateProvider.cpp b/third_party/WebKit/Source/platform/graphics/CompositorMutableStateProvider.cpp
index aee37a177d6597fb7d2f5eac92838ed8194df9a2..66f46a5ffe88a18b69e1475ebbbbefea4fc6f0f1 100644
--- a/third_party/WebKit/Source/platform/graphics/CompositorMutableStateProvider.cpp
+++ b/third_party/WebKit/Source/platform/graphics/CompositorMutableStateProvider.cpp
@@ -11,6 +11,7 @@
 #include "platform/graphics/CompositorMutableState.h"
 #include "platform/graphics/CompositorMutation.h"
 #include "wtf/PassOwnPtr.h"
+#include "wtf/PtrUtil.h"
 
 namespace blink {
 
@@ -22,7 +23,7 @@ CompositorMutableStateProvider::CompositorMutableStateProvider(cc::LayerTreeImpl
 
 CompositorMutableStateProvider::~CompositorMutableStateProvider() {}
 
-PassOwnPtr<CompositorMutableState>
+std::unique_ptr<CompositorMutableState>
 CompositorMutableStateProvider::getMutableStateFor(uint64_t element_id)
 {
     cc::LayerImpl* mainLayer = m_state->LayerByElementId(createCompositorElementId(element_id, CompositorSubElementId::Primary));
@@ -40,7 +41,7 @@ CompositorMutableStateProvider::getMutableStateFor(uint64_t element_id)
     if (result.isNewEntry)
         result.storedValue->value = adoptPtr(new CompositorMutation);
 
-    return adoptPtr(new CompositorMutableState(result.storedValue->value.get(), mainLayer, scrollLayer));
+    return wrapUnique(new CompositorMutableState(result.storedValue->value.get(), mainLayer, scrollLayer));
 }
 
 } // namespace blink