Remove last usage of kReturnToCache_FlagBit flag.

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 04377924a0f6b67dfc1357941204c5bdcdc5b310..e74a1c7a0a0bcbbe47e46c8605a3faa68c7880c9 100644
--- a/Source/platform/graphics/Canvas2DLayerBridge.cpp
+++ b/Source/platform/graphics/Canvas2DLayerBridge.cpp
@@ -511,10 +511,8 @@ void Canvas2DLayerBridge::mailboxReleased(const WebExternalTextureMailbox& mailb
                 // in future.
                 if (mailboxInfo->m_image) {
                     GrTexture* texture = mailboxInfo->m_image->getTexture();
-                    if (texture) {
-                        texture->resetFlag(static_cast<GrTextureFlags>(GrTexture::kReturnToCache_FlagBit));
+                    if (texture)
                         texture->textureParamsModified();
-                    }
                     mailboxInfo->m_image.clear();
                 }
                 if (m_destructionInProgress) {