Ignore seek operations to the current time during pause state. This change

is required to remove the noseekrequired logic in HTMLMediaElement.cpp

BUG=266631

Review URL: https://codereview.chromium.org/685993002

Cr-Commit-Position: refs/heads/master@{#304019}

media/blink/webmediaplayer_impl.cc

@@ -337,8 +337,20 @@ void WebMediaPlayerImpl::seek(double seconds) {
   media_log_->AddEvent(media_log_->CreateSeekEvent(seconds));
 
   // Update our paused time.
-  if (paused_)
-    paused_time_ = seek_time;
+  // In paused state ignore the seek operations to current time and generate
+  // buffer state change event to eventually fire seeking and seeked events
+  if (paused_) {
+    if (paused_time_ != seek_time) {
+      paused_time_ = seek_time;
+    } else {
+      main_task_runner_->PostTask(
+          FROM_HERE,
+          base::Bind(&WebMediaPlayerImpl::OnPipelineBufferingStateChanged,
+                     AsWeakPtr(),
+                     BUFFERING_HAVE_ENOUGH));
+      return;
+    }
+  }
 
   seeking_ = true;