SkShader::asACompose is android-only

Bug: skia:
Change-Id: Ib99a7ee4984544f342699fa6b20797c55be7d5a0
Reviewed-on: https://skia-review.googlesource.com/19268
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/src/shaders/SkComposeShader.cpp b/src/shaders/SkComposeShader.cpp
index 3155784..1eae163 100644
--- a/src/shaders/SkComposeShader.cpp
+++ b/src/shaders/SkComposeShader.cpp
@@ -69,6 +69,7 @@
                        fMode, fLerpT);
 }
 
+#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
 bool SkComposeShader::asACompose(ComposeRec* rec) const {
     if (!this->isJustMode()) {
         return false;
@@ -81,6 +82,7 @@
     }
     return true;
 }
+#endif
 
 bool SkComposeShader::onAppendStages(SkRasterPipeline* pipeline, SkColorSpace* dstCS,
                                      SkArenaAlloc* alloc, const SkMatrix& ctm,