Fix unused variable warnings.

BUG=angleproject:1442

Change-Id: I07b32d4c1f1a95f136bf922e78053e0de41c1633
Reviewed-on: https://chromium-review.googlesource.com/366083
Reviewed-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/libANGLE/Context.cpp b/src/libANGLE/Context.cpp
index 4a6b4e3..5c032bf 100644
--- a/src/libANGLE/Context.cpp
+++ b/src/libANGLE/Context.cpp
@@ -1545,6 +1545,7 @@
     GLenum nativeType;
     unsigned int numParams;
     bool queryStatus = getIndexedQueryParameterInfo(target, &nativeType, &numParams);
+    UNUSED_ASSERTION_VARIABLE(queryStatus);
     ASSERT(queryStatus);
 
     if (nativeType == GL_INT)
@@ -1577,6 +1578,7 @@
     GLenum nativeType;
     unsigned int numParams;
     bool queryStatus = getIndexedQueryParameterInfo(target, &nativeType, &numParams);
+    UNUSED_ASSERTION_VARIABLE(queryStatus);
     ASSERT(queryStatus);
 
     if (nativeType == GL_INT_64_ANGLEX)
@@ -1597,6 +1599,7 @@
     GLenum nativeType;
     unsigned int numParams;
     bool queryStatus = getIndexedQueryParameterInfo(target, &nativeType, &numParams);
+    UNUSED_ASSERTION_VARIABLE(queryStatus);
     ASSERT(queryStatus);
 
     if (nativeType == GL_BOOL)