Replace WebSocketFrameChunk with WebSocketFrame

net/websockets/websocket_frame.h

Index: net/websockets/websocket_frame.h
diff --git a/net/websockets/websocket_frame.h b/net/websockets/websocket_frame.h
index 8c04f7dce44476a8820d17fd549eaab26b9439bf..b3d3ec21a0d8e8041a8c4fd95e95e7f4e29b806d 100644
--- a/net/websockets/websocket_frame.h
+++ b/net/websockets/websocket_frame.h
@@ -14,6 +14,7 @@
 
 namespace net {
 
+class IOBuffer;
 class IOBufferWithSize;
 
 // Represents a WebSocket frame header.
@@ -69,7 +70,10 @@ struct NET_EXPORT WebSocketFrameHeader {
         payload_length(0) {}
 
   // Create a clone of this object on the heap.
-  scoped_ptr<WebSocketFrameHeader> Clone();
+  scoped_ptr<WebSocketFrameHeader> Clone() const;
+
+  // Overwrite this object with the fields from |source|.
+  void CopyFrom(const WebSocketFrameHeader& source);
 
   // Members below correspond to each item in WebSocket frame header.
   // See <http://tools.ietf.org/html/rfc6455#section-5.2> for details.
@@ -85,16 +89,32 @@ struct NET_EXPORT WebSocketFrameHeader {
   DISALLOW_COPY_AND_ASSIGN(WebSocketFrameHeader);
 };
 
-// Contains payload data of part of a WebSocket frame.
+// Contains an entire WebSocket frame including payload. This is used by APIs
+// that are not concerned about retaining the original frame boundaries (because
+// frames may need to be split in order for the data to fit in memory).
+struct NET_EXPORT_PRIVATE WebSocketFrame {
+  // A frame must always have an opcode, so this parameter is compulsory.
+  explicit WebSocketFrame(WebSocketFrameHeader::OpCode opcode);
+  ~WebSocketFrame();
+
+  // |header| is always present.
+  WebSocketFrameHeader header;
+
+  // |data| is always unmasked even if the frame is masked. The size of |data|
+  // |is given by |header.payload_length|.
+  scoped_refptr<IOBuffer> data;
+};
+
+// Structure describing one chunk of a WebSocket frame.
 //
-// Payload of a WebSocket frame may be divided into multiple chunks.
+// The payload of a WebSocket frame may be divided into multiple chunks.
 // You need to look at |final_chunk| member variable to detect the end of a
 // series of chunk objects of a WebSocket frame.
 //
-// Frame dissection is necessary to handle WebSocket frame stream containing
-// abritrarily large frames in the browser process. Because the server may send
-// a huge frame that doesn't fit in the memory, we cannot store the entire
-// payload data in the memory.
+// Frame dissection is necessary to handle frames that are too large to store in
+// the browser memory without losing information about the frame boundaries. In
+// practice, most code does not need to worry about the original frame
+// boundaries and can use the WebSocketFrame type declared above.
 //
 // Users of this struct should treat WebSocket frames as a data stream; it's
 // important to keep the frame data flowing, especially in the browser process.