Fix skia build broken by commit c38cd6

core/fxge/ge/fx_ge_device.cpp

Index: core/fxge/ge/fx_ge_device.cpp
diff --git a/core/fxge/ge/fx_ge_device.cpp b/core/fxge/ge/fx_ge_device.cpp
index 571f90cfa11658217c0ad51202c02ad09fd33f7e..2f4e0a0eec24b11305c8908b5e974cb1f5c39c0a 100644
--- a/core/fxge/ge/fx_ge_device.cpp
+++ b/core/fxge/ge/fx_ge_device.cpp
@@ -21,6 +21,12 @@ CFX_RenderDevice::CFX_RenderDevice()
 
 CFX_RenderDevice::~CFX_RenderDevice() {}
 
+#ifdef _SKIA_SUPPORT_
+void CFX_RenderDevice::Flush() {
+  m_pDeviceDriver.reset();
+}
+#endif
+
 void CFX_RenderDevice::SetDeviceDriver(
     std::unique_ptr<IFX_RenderDeviceDriver> pDriver) {
   m_pDeviceDriver = std::move(pDriver);