Client side display item cache flag

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

Index: third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp b/third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp
index d6859198543723a4e29edd42eaced97e77ba7872..5c6e980588dfb877d7138086fa79df0fe387ad9e 100644
--- a/third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp
+++ b/third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp
@@ -335,12 +335,13 @@ bool GraphicsLayer::paintWithoutCommit(const IntRect* interestRect, GraphicsCont
         interestRect = &newInterestRect;
     }
 
-    if (!getPaintController().subsequenceCachingIsDisabled()
-        && !m_client->needsRepaint(*this)
+    if (!m_client->needsRepaint(*this)
         && !getPaintController().cacheIsEmpty()
         && m_previousInterestRect == *interestRect) {
         ASSERT(!getPaintController().hasInvalidations());
-        return false;
+        if (!getPaintController().subsequenceCachingIsDisabled())
+            return false;
+        DisplayItemClient::s_cacheStatus = true;
     }
 
     GraphicsContext context(getPaintController(), disabledMode);
@@ -358,6 +359,7 @@ bool GraphicsLayer::paintWithoutCommit(const IntRect* interestRect, GraphicsCont
     m_previousInterestRect = *interestRect;
     m_client->paintContents(this, context, m_paintingPhase, *interestRect);
     notifyFirstPaintToClient();
+    DisplayItemClient::s_cacheStatus = false;
     return true;
 }
 
@@ -1217,6 +1219,13 @@ void GraphicsLayer::setCompositorMutableProperties(uint32_t properties)
         layer->setCompositorMutableProperties(properties);
 }
 
+void GraphicsLayer::setCanUseClientCacheStatus(bool b)
+{
+    if (!drawsContent())
+        return;
+    getPaintController().setCanUseClientCacheStatus(b);
+}
+
 } // namespace blink
 
 #ifndef NDEBUG