Bug 1361497 - Follow-up to fix unified build bustage on Windows. r=bustage

MozReview-Commit-ID: 17o1RJVbmiT

gfx/layers/wr/WebRenderBridgeChild.cpp

@@ -17,6 +17,8 @@
 namespace mozilla {
 namespace layers {
 
+using namespace mozilla::gfx;
+
 WebRenderBridgeChild::WebRenderBridgeChild(const wr::PipelineId& aPipelineId)
   : mReadLockSequenceNumber(0)
   , mIsInTransaction(false)