Disable pipe playback on android for composeshader GM.

Review URL: https://codereview.appspot.com/6349058

git-svn-id: http://skia.googlecode.com/svn/trunk@4409 2bbb7eff-a529-9590-31e7-b0007b416f81

gm/composeshader.cpp

@@ -59,10 +59,15 @@ protected:
         return make_isize(640, 480);
     }
 
+#ifdef SK_BUILD_FOR_ANDROID
+    virtual uint32_t onGetFlags() const SK_OVERRIDE {
+        return this->INHERITED::onGetFlags() | GM::kSkipPipe_Flag;
+    }
+#endif
+
     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
 
         SkPaint paint;
-        SkRect  r;
 
         paint.setColor(SK_ColorGREEN);
         canvas->drawRectCoords(0, 0, SkIntToScalar(100), SkIntToScalar(100), paint);