Delete unused method StreamInterface::ReadAll

Bug: webrtc:6424
Change-Id: Ibc76d28a504864b0d089268dd1a8438ec77b19f7
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/128774
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27276}

rtc_base/stream.cc

@@ -50,24 +50,6 @@ StreamResult StreamInterface::WriteAll(const void* data,
   return result;
 }
 
-StreamResult StreamInterface::ReadAll(void* buffer,
-                                      size_t buffer_len,
-                                      size_t* read,
-                                      int* error) {
-  StreamResult result = SR_SUCCESS;
-  size_t total_read = 0, current_read;
-  while (total_read < buffer_len) {
-    result = Read(static_cast<char*>(buffer) + total_read,
-                  buffer_len - total_read, &current_read, error);
-    if (result != SR_SUCCESS)
-      break;
-    total_read += current_read;
-  }
-  if (read)
-    *read = total_read;
-  return result;
-}
-
 void StreamInterface::PostEvent(Thread* t, int events, int err) {
   t->Post(RTC_FROM_HERE, this, MSG_POST_EVENT,
           new StreamEventData(events, err));

rtc_base/stream.h

@@ -126,13 +126,6 @@ class StreamInterface : public MessageHandler {
                         size_t* written,
                         int* error);
 
-  // Similar to ReadAll.  Calls Read until buffer_len bytes have been read, or
-  // until a non-SR_SUCCESS result is returned.  'read' is always set.
-  StreamResult ReadAll(void* buffer,
-                       size_t buffer_len,
-                       size_t* read,
-                       int* error);
-
  protected:
   StreamInterface();