Expose a seekable range at 0 for streaming sources with duration.

content/renderer/media/android/webmediaplayer_android.cc

Index: content/renderer/media/android/webmediaplayer_android.cc
diff --git a/content/renderer/media/android/webmediaplayer_android.cc b/content/renderer/media/android/webmediaplayer_android.cc
index 0c8910d9e738ec9fa50a26c75c2440c3955c53ff..af0c5d72cb749837860a7817202cc50e965cd935 100644
--- a/content/renderer/media/android/webmediaplayer_android.cc
+++ b/content/renderer/media/android/webmediaplayer_android.cc
@@ -11,6 +11,7 @@
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
+#include "base/float_util.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/single_thread_task_runner.h"
@@ -520,16 +521,12 @@ blink::WebTimeRanges WebMediaPlayerAndroid::buffered() const {
 }
 
 blink::WebTimeRanges WebMediaPlayerAndroid::seekable() const {
-  // If we haven't even gotten to ReadyStateHaveMetadata yet then there
-  // are no seekable ranges.
-  if (ready_state_ < WebMediaPlayer::ReadyStateHaveMetadata)
-    return blink::WebTimeRanges();
-
-  // If we have a duration then use [0, duration] as the seekable range.
+  // Media without duration are considered streaming and should not be seekable.
   const double seekable_end = duration();
-  if (!seekable_end)
+  if (!base::IsFinite(seekable_end))
     return blink::WebTimeRanges();
 
+  // If we have a finite duration then use [0, duration] as the seekable range.
   blink::WebTimeRange seekable_range(0.0, seekable_end);
   return blink::WebTimeRanges(&seekable_range, 1);
 }