Simplify flattening to just write enough to call the factory

src/core/SkShader.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapProcShader.h"
 #include "SkEmptyShader.h"
 #include "SkReadBuffer.h"
@@ skipping 27 matching lines @@
 
 SkShader::SkShader(const SkMatrix* localMatrix) {
     inc_shader_counter();
     if (localMatrix) {
         fLocalMatrix = *localMatrix;
     } else {
         fLocalMatrix.reset();
     }
 }
 
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
 SkShader::SkShader(SkReadBuffer& buffer) : INHERITED(buffer) {
     inc_shader_counter();
     if (buffer.readBool()) {
         buffer.readMatrix(&fLocalMatrix);
     } else {
         fLocalMatrix.reset();
     }
 }
+#endif
 
 SkShader::~SkShader() {
     dec_shader_counter();
 }
 
 void SkShader::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     bool hasLocalM = !fLocalMatrix.isIdentity();
     buffer.writeBool(hasLocalM);
     if (hasLocalM) {
@@ skipping 181 matching lines @@
 #include "SkUtils.h"
 
 SkColorShader::SkColorShader(SkColor c)
     : fColor(c) {
 }
 
 bool SkColorShader::isOpaque() const {
     return SkColorGetA(fColor) == 255;
 }
 
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
 SkColorShader::SkColorShader(SkReadBuffer& b) : INHERITED(b) {
     // V25_COMPATIBILITY_CODE We had a boolean to make the color shader inherit the paint's
     // color. We don't support that any more.
     if (b.isVersionLT(SkReadBuffer::kColorShaderNoBool_Version)) {
         if (b.readBool()) {
             SkDEBUGFAIL("We shouldn't have pictures that recorded the inherited case.");
             fColor = SK_ColorWHITE;
             return;
         }
     }
     fColor = b.readColor();
 }
+#endif
+
+SkFlattenable* SkColorShader::CreateProc(SkReadBuffer& buffer) {
+    return SkNEW_ARGS(SkColorShader, (buffer.readColor()));
+}
 
 void SkColorShader::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     buffer.writeColor(fColor);
 }
 
 uint32_t SkColorShader::ColorShaderContext::getFlags() const {
     return fFlags;
 }
 
@@ skipping 97 matching lines @@
     str->appendHex(fColor);
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif
 
 ///////////////////////////////////////////////////////////////////////////////
 
+SkFlattenable* SkEmptyShader::CreateProc(SkReadBuffer&) {
+    return SkShader::CreateEmptyShader();
+}
+
 #ifndef SK_IGNORE_TO_STRING
 #include "SkEmptyShader.h"
 
 void SkEmptyShader::toString(SkString* str) const {
     str->append("SkEmptyShader: (");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif