Add Http2FrameDecoderAdapter.

net/spdy/spdy_framer_decoder_adapter.h

Index: net/spdy/spdy_framer_decoder_adapter.h
diff --git a/net/spdy/spdy_framer_decoder_adapter.h b/net/spdy/spdy_framer_decoder_adapter.h
index 4c08c53b6385c4024afaff2dff6072d46077d781..20b70f647ab20e2d80458c6d18d02c083bd24824 100644
--- a/net/spdy/spdy_framer_decoder_adapter.h
+++ b/net/spdy/spdy_framer_decoder_adapter.h
@@ -54,9 +54,10 @@ class SpdyFramerDecoderAdapter {
     return process_single_input_frame_;
   }
 
-  // Decode the |len| bytes of encoded HTTP/2 starting at |*data|. Returns the
-  // number of bytes consumed. It is safe to pass more bytes in than may be
-  // consumed.
+  // Decode the |len| bytes of encoded HTTP/2 starting at |*data|. Returns
+  // the number of bytes consumed. It is safe to pass more bytes in than
+  // may be consumed. Should process (or otherwise buffer) as much as
+  // available, unless process_single_input_frame is true.
   virtual size_t ProcessInput(const char* data, size_t len) = 0;
 
   // Reset the decoder (used just for tests at this time).
@@ -68,9 +69,9 @@ class SpdyFramerDecoderAdapter {
   // Current error code (NO_ERROR if state != ERROR).
   virtual SpdyFramer::SpdyError error_code() const = 0;
 
-  // Did the most recently decoded frame header appear to be the start of an
-  // HTTP/1.1 (or earlier) response? Used to detect if a backend/server that
-  // we sent a request to, responded with an HTTP/1.1 response?
+  // Has any frame header looked like the start of an HTTP/1.1 (or earlier)
+  // response? Used to detect if a backend/server that we sent a request to
+  // has responded with an HTTP/1.1 (or earlier) response.
   virtual bool probable_http_response() const = 0;
 
  private: