Revert of Fast path for blurred round rects -- blur a small 9patch rect on the CPU

src/images/SkImageDecoder_libwebp.cpp

Index: src/images/SkImageDecoder_libwebp.cpp
diff --git a/src/images/SkImageDecoder_libwebp.cpp b/src/images/SkImageDecoder_libwebp.cpp
index 02990258ebe84dbce0f46c5436a95b24b8bfe8b2..4e23e50f5760fcf2024799265d7b4257823cf071 100644
--- a/src/images/SkImageDecoder_libwebp.cpp
+++ b/src/images/SkImageDecoder_libwebp.cpp
@@ -555,6 +555,15 @@
       rgb[0] = SkGetPackedR32(c);
       rgb[1] = SkGetPackedG32(c);
       rgb[2] = SkGetPackedB32(c);
+      rgb += 3;
+  }
+}
+
+static void Alpha8_To_RGB(const uint8_t* in, uint8_t* rgb, int width,
+                          const SkPMColor* SK_RESTRICT ctable) {
+  const uint8_t* SK_RESTRICT src = (const uint8_t*)in;
+  for (int i = 0; i < width; ++i) {
+      rgb[0] = rgb[1] = rgb[2] = *src++;
       rgb += 3;
   }
 }
@@ -585,6 +594,9 @@
         case SkBitmap::kIndex8_Config:
             *bpp = 3;
             return Index8_To_RGB;
+        case SkBitmap::kA8_Config:
+            *bpp = 3;
+            return Alpha8_To_RGB;
         default:
             return NULL;
     }