Instead of enqueueing SPDY frames, enqueue SPDY streams that are ready to produce data.

net/spdy/spdy_io_buffer.cc

Index: net/spdy/spdy_io_buffer.cc
diff --git a/net/spdy/spdy_io_buffer.cc b/net/spdy/spdy_io_buffer.cc
index 5720f7def5f3036d3ebd37e15f905dd56c2e2cbd..f0c14b12f6aad8852d194cf8dec673937e60eb3b 100644
--- a/net/spdy/spdy_io_buffer.cc
+++ b/net/spdy/spdy_io_buffer.cc
@@ -20,8 +20,23 @@ SpdyIOBuffer::SpdyIOBuffer(
 SpdyIOBuffer::SpdyIOBuffer() : priority_(HIGHEST), position_(0), stream_(NULL) {
 }
 
+SpdyIOBuffer::SpdyIOBuffer(const SpdyIOBuffer& rhs) {
+  buffer_ = rhs.buffer_;
+  priority_ = rhs.priority_;
+  position_ = rhs.position_;
+  stream_ = rhs.stream_;
+}
+
 SpdyIOBuffer::~SpdyIOBuffer() {}
 
+SpdyIOBuffer& SpdyIOBuffer::operator=(const SpdyIOBuffer& rhs) {
+  buffer_ = rhs.buffer_;
+  priority_ = rhs.priority_;
+  position_ = rhs.position_;
+  stream_ = rhs.stream_;
+  return *this;
+}
+
 void SpdyIOBuffer::release() {
   buffer_ = NULL;
   stream_ = NULL;