remove unneeded readbuffer flags

- buffers are always 'cross-process'
- readbuffer is always validating

Bug:796107
Change-Id: I59614e9c29490c0b029c60d2aafe2806671bc9e1
Reviewed-on: https://skia-review.googlesource.com/90560
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/src/core/SkWriteBuffer.h b/src/core/SkWriteBuffer.h
index bd3864c..82691b3 100644
--- a/src/core/SkWriteBuffer.h
+++ b/src/core/SkWriteBuffer.h
@@ -25,8 +25,6 @@
     SkWriteBuffer() {}
     virtual ~SkWriteBuffer() {}
 
-    virtual bool isCrossProcess() const = 0;
-
     virtual void writePad32(const void* buffer, size_t bytes) = 0;
 
     virtual void writeByteArray(const void* data, size_t size) = 0;
@@ -77,18 +75,10 @@
  */
 class SkBinaryWriteBuffer : public SkWriteBuffer {
 public:
-    enum Flags {
-        kCrossProcess_Flag = 1 << 0,
-    };
-
-    SkBinaryWriteBuffer(uint32_t flags = 0);
-    SkBinaryWriteBuffer(void* initialStorage, size_t storageSize, uint32_t flags = 0);
+    SkBinaryWriteBuffer();
+    SkBinaryWriteBuffer(void* initialStorage, size_t storageSize);
     ~SkBinaryWriteBuffer() override;
 
-    bool isCrossProcess() const override {
-        return SkToBool(fFlags & kCrossProcess_Flag);
-    }
-
     void write(const void* buffer, size_t bytes) {
         fWriter.write(buffer, bytes);
     }
@@ -135,7 +125,6 @@
     SkRefCntSet* setTypefaceRecorder(SkRefCntSet*);
 
 private:
-    const uint32_t fFlags;
     SkFactorySet* fFactorySet;
     SkWriter32 fWriter;