Remove unneeded ContextImpl::syncState parameter.

The 'state' parameter passed to ContextImpl::syncState() is already
available in ContextImpl as mState.getState().

BUG=none

Change-Id: I13283664579fa04ae67b1d1bbc0cb4426a950b97
Reviewed-on: https://chromium-review.googlesource.com/444099
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
diff --git a/src/libANGLE/renderer/null/ContextNULL.cpp b/src/libANGLE/renderer/null/ContextNULL.cpp
index 6fcf819..51d3a2a 100644
--- a/src/libANGLE/renderer/null/ContextNULL.cpp
+++ b/src/libANGLE/renderer/null/ContextNULL.cpp
@@ -250,7 +250,7 @@
 {
 }
 
-void ContextNULL::syncState(const gl::State &state, const gl::State::DirtyBits &dirtyBits)
+void ContextNULL::syncState(const gl::State::DirtyBits &dirtyBits)
 {
 }