Remove usage of kReturnToCache_FlagBit in C2D layer bridge.

Source/platform/graphics/Canvas2DLayerBridge.cpp

Index: Source/platform/graphics/Canvas2DLayerBridge.cpp
diff --git a/Source/platform/graphics/Canvas2DLayerBridge.cpp b/Source/platform/graphics/Canvas2DLayerBridge.cpp
index 93917394085ac46469456f87a9eb5834a46d76c2..04377924a0f6b67dfc1357941204c5bdcdc5b310 100644
--- a/Source/platform/graphics/Canvas2DLayerBridge.cpp
+++ b/Source/platform/graphics/Canvas2DLayerBridge.cpp
@@ -319,8 +319,6 @@ void Canvas2DLayerBridge::freeReleasedMailbox()
     }
     // Invalidate texture state in case the compositor altered it since the copy-on-write.
     if (mailboxInfo->m_image) {
-        if (isHidden() || releasedMailboxHasExpired())
-            mailboxInfo->m_image->getTexture()->resetFlag(static_cast<GrTextureFlags>(GrTexture::kReturnToCache_FlagBit));
         mailboxInfo->m_image->getTexture()->textureParamsModified();
         mailboxInfo->m_image.clear();
     }