Fix progress reporting for multibuffers to report progress for every byte we receive.

media/blink/resource_multibuffer_data_provider.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/blink/resource_multibuffer_data_provider.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 112 matching lines @@
 bool ResourceMultiBufferDataProvider::Available() const {
   if (fifo_.empty())
     return false;
   if (fifo_.back()->end_of_stream())
     return true;
   if (fifo_.front()->data_size() == block_size())
     return true;
   return false;
 }
 
+int64_t ResourceMultiBufferDataProvider::AvailableBytes() const {
+  int64_t bytes = 0;
+  for (const auto i : fifo_) {
+    if (i->end_of_stream())
+      break;
+    bytes += i->data_size();
+  }
+  return bytes;
+}
+
 scoped_refptr<DataBuffer> ResourceMultiBufferDataProvider::Read() {
   DCHECK(Available());
   scoped_refptr<DataBuffer> ret = fifo_.front();
   fifo_.pop_front();
   ++pos_;
   return ret;
 }
 
 void ResourceMultiBufferDataProvider::SetDeferred(bool deferred) {
   if (!active_loader_ || active_loader_->deferred() == deferred)
@@ skipping 190 matching lines @@
     }
     int last_block_size = fifo_.back()->data_size();
     int to_append = std::min<int>(data_length, block_size() - last_block_size);
     DCHECK_GT(to_append, 0);
     memcpy(fifo_.back()->writable_data() + last_block_size, data, to_append);
     data += to_append;
     fifo_.back()->set_data_size(last_block_size + to_append);
     data_length -= to_append;
   }
 
-  if (Available())
-    url_data_->multibuffer()->OnDataProviderEvent(this);
+  url_data_->multibuffer()->OnDataProviderEvent(this);
 
   // Beware, this object might be deleted here.
 }
 
 void ResourceMultiBufferDataProvider::didDownloadData(WebURLLoader* loader,
                                                       int dataLength,
                                                       int encoded_data_length) {
   NOTIMPLEMENTED();
 }
 
@@ skipping 143 matching lines @@
   }
 
   if (byte_pos() != first_byte_position) {
     return false;
   }
 
   return true;
 }
 
 }  // namespace media