Remove SpdyPingControlFrame struct. Useful for SPDY 4 development.

net/spdy/spdy_protocol.h

Index: net/spdy/spdy_protocol.h
diff --git a/net/spdy/spdy_protocol.h b/net/spdy/spdy_protocol.h
index 1cc19940282168b31327776cfe26237ae4fe383f..dd7e7534ada60111009ffbe074061349ee672ed4 100644
--- a/net/spdy/spdy_protocol.h
+++ b/net/spdy/spdy_protocol.h
@@ -503,11 +503,6 @@ struct SpdySettingsControlFrameBlock : SpdyFrameBlock {
   // Variable data here.
 };
 
-// A PING Control Frame structure.
-struct SpdyPingControlFrameBlock : SpdyFrameBlock {
-  uint32 unique_id_;
-};
-
 // TODO(avd): remove this struct
 // A CREDENTIAL Control Frame structure.
 struct SpdyCredentialControlFrameBlock : SpdyFrameBlock {
@@ -1112,31 +1107,6 @@ class SpdySettingsControlFrame : public SpdyControlFrame {
   DISALLOW_COPY_AND_ASSIGN(SpdySettingsControlFrame);
 };
 
-class SpdyPingControlFrame : public SpdyControlFrame {
- public:
-  SpdyPingControlFrame() : SpdyControlFrame(size()) {}
-  SpdyPingControlFrame(char* data, bool owns_buffer)
-      : SpdyControlFrame(data, owns_buffer) {}
-
-  uint32 unique_id() const {
-    return ntohl(block()->unique_id_);
-  }
-
-  void set_unique_id(uint32 unique_id) {
-    mutable_block()->unique_id_ = htonl(unique_id);
-  }
-
-  static size_t size() { return sizeof(SpdyPingControlFrameBlock); }
-
- private:
-  const struct SpdyPingControlFrameBlock* block() const {
-    return static_cast<SpdyPingControlFrameBlock*>(frame_);
-  }
-  struct SpdyPingControlFrameBlock* mutable_block() {
-    return static_cast<SpdyPingControlFrameBlock*>(frame_);
-  }
-};
-
 class SpdyCredentialControlFrame : public SpdyControlFrame {
  public:
   SpdyCredentialControlFrame() : SpdyControlFrame(size()) {}