Remove gpu support for willUseHWAALines.

src/gpu/gl/GrGpuGL.h

Index: src/gpu/gl/GrGpuGL.h
diff --git a/src/gpu/gl/GrGpuGL.h b/src/gpu/gl/GrGpuGL.h
index a8a9727b32160faf984f5b8c1da155418a9434e8..3d84188b1924e81573a86a94890bac1cec780fd6 100644
--- a/src/gpu/gl/GrGpuGL.h
+++ b/src/gpu/gl/GrGpuGL.h
@@ -443,15 +443,7 @@ private:
         }
     } fHWBlendState;
 
-    struct {
-        TriState fMSAAEnabled;
-        TriState fSmoothLineEnabled;
-        void invalidate() {
-            fMSAAEnabled = kUnknown_TriState;
-            fSmoothLineEnabled = kUnknown_TriState;
-        }
-    } fHWAAState;
-
+    TriState                    fMSAAEnabled;
 
     GrGLProgram::MatrixState    fHWProjectionMatrixState;