Stream to file implementation.

chrome/browser/renderer_host/buffered_resource_handler.cc

Index: chrome/browser/renderer_host/buffered_resource_handler.cc
===================================================================
--- chrome/browser/renderer_host/buffered_resource_handler.cc	(revision 53911)
+++ chrome/browser/renderer_host/buffered_resource_handler.cc	(working copy)
@@ -242,6 +242,9 @@
   DCHECK(read_buffer_);
   if (my_buffer_) {
     // We are using our own buffer to read, update the main buffer.
+    // TODO(darin): We should handle the case where read_buffer_size_ is small!
+    // See RedirectToFileResourceHandler::BufIsFull to see how this impairs
+    // downstream ResourceHandler implementations.
     CHECK_LT(bytes_read + bytes_read_, read_buffer_size_);
     memcpy(read_buffer_->data() + bytes_read_, my_buffer_->data(), bytes_read);
     my_buffer_ = NULL;