Revert of Remove gpu support for willUseHWAALines.

src/gpu/gl/GrGpuGL.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGpuGL_DEFINED
 #define GrGpuGL_DEFINED
 
@@ skipping 425 matching lines @@
         TriState        fEnabled;
 
         void invalidate() {
             fSrcCoeff = kInvalid_GrBlendCoeff;
             fDstCoeff = kInvalid_GrBlendCoeff;
             fConstColorValid = false;
             fEnabled = kUnknown_TriState;
         }
     } fHWBlendState;
 
-    TriState                    fMSAAEnabled;
+    struct {
+        TriState fMSAAEnabled;
+        TriState fSmoothLineEnabled;
+        void invalidate() {
+            fMSAAEnabled = kUnknown_TriState;
+            fSmoothLineEnabled = kUnknown_TriState;
+        }
+    } fHWAAState;
+
 
     GrGLProgram::MatrixState    fHWProjectionMatrixState;
 
     GrStencilSettings           fHWStencilSettings;
     TriState                    fHWStencilTestEnabled;
     GrStencilSettings           fHWPathStencilSettings;
 
     GrDrawState::DrawFace       fHWDrawFace;
     TriState                    fHWWriteToColor;
     TriState                    fHWDitherEnabled;
@@ skipping 12 matching lines @@
     // we record what stencil format worked last time to hopefully exit early
     // from our loop that tries stencil formats and calls check fb status.
     int fLastSuccessfulStencilFmtIdx;
 
     SkAutoTDelete<GrGLNameAllocator> fPathNameAllocator;
 
     typedef GrGpu INHERITED;
 };
 
 #endif