Add SkColor4f serialization

src/core/SkValidatingReadBuffer.cpp

Index: src/core/SkValidatingReadBuffer.cpp
diff --git a/src/core/SkValidatingReadBuffer.cpp b/src/core/SkValidatingReadBuffer.cpp
index 1566af948819355cff8846cf0d022f687df8e139..d57e499cc198177dbfd4d364ebdd45df0c08374f 100644
--- a/src/core/SkValidatingReadBuffer.cpp
+++ b/src/core/SkValidatingReadBuffer.cpp
@@ -110,6 +110,13 @@ void SkValidatingReadBuffer::readString(SkString* string) {
     }
 }
 
+void SkValidatingReadBuffer::readColor4f(SkColor4f* color) {
+    const void* ptr = this->skip(sizeof(SkColor4f));
+    if (!fError) {
+        memcpy(color, ptr, sizeof(SkColor4f));
+    }
+}
+
 void SkValidatingReadBuffer::readPoint(SkPoint* point) {
     point->fX = this->readScalar();
     point->fY = this->readScalar();
@@ -197,6 +204,10 @@ bool SkValidatingReadBuffer::readColorArray(SkColor* colors, size_t size) {
     return readArray(colors, size, sizeof(SkColor));
 }
 
+bool SkValidatingReadBuffer::readColor4fArray(SkColor4f* colors, size_t size) {
+    return readArray(colors, size, sizeof(SkColor4f));
+}
+
 bool SkValidatingReadBuffer::readIntArray(int32_t* values, size_t size) {
     return readArray(values, size, sizeof(int32_t));
 }