Improve retry support for media network loading.

media/blink/buffered_data_source.cc

Index: media/blink/buffered_data_source.cc
diff --git a/media/blink/buffered_data_source.cc b/media/blink/buffered_data_source.cc
index b26f0f13895ea2a4d9d16bfe5e4b5711d747c579..f3c518acab8054ba7eedc68cdcae0c2115c1187a 100644
--- a/media/blink/buffered_data_source.cc
+++ b/media/blink/buffered_data_source.cc
@@ -23,17 +23,23 @@ namespace {
 // of FFmpeg.
 const int kInitialReadBufferSize = 32768;
 
-// Number of cache misses or read failures we allow for a single Read() before
-// signaling an error.
-const int kLoaderRetries = 3;
-
 // The number of milliseconds to wait before retrying a failed load.
 const int kLoaderFailedRetryDelayMs = 250;
 
+// Each retry, add this many MS to the delay.
+const int kAdditionalDelayPerRetryMs = 50;
+
 }  // namespace
 
 namespace media {
 
+// Number of cache misses or read failures we allow for a single Read() before
+// signaling an error.
+// total delay is:
+// (kLoaderPartialRetryDelayMs +
+//  kAdditionalDelayPerRetryMs * (kMaxRetries - 1) / 2) * kMaxretries = 29250 ms
+const int BufferedDataSource::kLoaderRetries = 30;
+
 class BufferedDataSource::ReadOperation {
  public:
   ReadOperation(int64_t position,
@@ -491,7 +497,9 @@ void BufferedDataSource::ReadCallback(
             FROM_HERE, base::Bind(&BufferedDataSource::ReadCallback,
                                   weak_factory_.GetWeakPtr(),
                                   BufferedResourceLoader::kCacheMiss, 0),
-            base::TimeDelta::FromMilliseconds(kLoaderFailedRetryDelayMs));
+            base::TimeDelta::FromMilliseconds(kLoaderFailedRetryDelayMs +
+                                              read_op_->retries() *
+                                                  kAdditionalDelayPerRetryMs));
         return;
       }