Simplify flattening to just write enough to call the factory

src/core/SkBitmapProcShader.cpp

Index: src/core/SkBitmapProcShader.cpp
diff --git a/src/core/SkBitmapProcShader.cpp b/src/core/SkBitmapProcShader.cpp
index e7cc035c7439c724d67d33a8691109006dcbe8ee..82b96eb9179398784385c0dfa3efb1ebdbd0b822 100644
--- a/src/core/SkBitmapProcShader.cpp
+++ b/src/core/SkBitmapProcShader.cpp
@@ -39,13 +39,14 @@ SkBitmapProcShader::SkBitmapProcShader(const SkBitmap& src, TileMode tmx, TileMo
     fTileModeY = (uint8_t)tmy;
 }
 
-SkBitmapProcShader::SkBitmapProcShader(SkReadBuffer& buffer)
-        : INHERITED(buffer) {
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
+SkBitmapProcShader::SkBitmapProcShader(SkReadBuffer& buffer) : INHERITED(buffer) {
     buffer.readBitmap(&fRawBitmap);
     fRawBitmap.setImmutable();
     fTileModeX = buffer.readUInt();
     fTileModeY = buffer.readUInt();
 }
+#endif
 
 SkShader::BitmapType SkBitmapProcShader::asABitmap(SkBitmap* texture,
                                                    SkMatrix* texM,
@@ -63,9 +64,20 @@ SkShader::BitmapType SkBitmapProcShader::asABitmap(SkBitmap* texture,
     return kDefault_BitmapType;
 }
 
-void SkBitmapProcShader::flatten(SkWriteBuffer& buffer) const {
-    this->INHERITED::flatten(buffer);
+SkFlattenable* SkBitmapProcShader::CreateProc(SkReadBuffer& buffer) {
+    SkMatrix lm;
+    buffer.readMatrix(&lm);
+    SkBitmap bm;
+    if (!buffer.readBitmap(&bm)) {
+        return NULL;
+    }
+    TileMode mx = (TileMode)buffer.readUInt();
+    TileMode my = (TileMode)buffer.readUInt();
+    return SkShader::CreateBitmapShader(bm, mx, my, &lm);
+}
 
+void SkBitmapProcShader::flatten(SkWriteBuffer& buffer) const {
+    buffer.writeMatrix(this->getLocalMatrix());
     buffer.writeBitmap(fRawBitmap);
     buffer.writeUInt(fTileModeX);
     buffer.writeUInt(fTileModeY);