Cleanup of SSE optimization files.

src/opts/SkBitmapProcState_opts_SSSE3.h

Index: src/opts/SkBitmapProcState_opts_SSSE3.h
diff --git a/src/opts/SkBitmapProcState_opts_SSSE3.h b/src/opts/SkBitmapProcState_opts_SSSE3.h
index 176f2bfbe7421e693c306f42b269123e7d55762f..9fd074aacf27a55907529097366db5dffd71b753 100644
--- a/src/opts/SkBitmapProcState_opts_SSSE3.h
+++ b/src/opts/SkBitmapProcState_opts_SSSE3.h
@@ -5,6 +5,9 @@
  * found in the LICENSE file.
  */
 
+#ifndef SkBitmapProcState_opts_SSSE3_DEFINED
+#define SkBitmapProcState_opts_SSSE3_DEFINED
+
 #include "SkBitmapProcState.h"
 
 void S32_opaque_D32_filter_DX_SSSE3(const SkBitmapProcState& s,
@@ -19,3 +22,5 @@ void S32_opaque_D32_filter_DXDY_SSSE3(const SkBitmapProcState& s,
 void S32_alpha_D32_filter_DXDY_SSSE3(const SkBitmapProcState& s,
                                    const uint32_t* xy,
                                    int count, uint32_t* colors);
+
+#endif