Bug 1308078. Part 2 - no need to store mQueuedSeek in WaitForCDMState::HandleDormant. r=kaku

Because we haven't decoded any data and are at position 0, there is no need to seek when exiting the dormant state.

MozReview-Commit-ID: AKAcqW3HfRN

--HG--
extra : rebase_source : 45056ef8a67a2869b90ea3b1ab842bfca310b9aa
extra : source : 2dc17c8ca765eee1d05956b087804bb760af0e48

dom/media/MediaDecoderStateMachine.cpp

@@ -379,6 +379,15 @@ public:
     return DECODER_STATE_WAIT_FOR_CDM;
   }
 
+  bool HandleDormant(bool aDormant) override
+  {
+    if (aDormant) {
+      // No need to store mQueuedSeek because we are at position 0.
+      SetState(DECODER_STATE_DORMANT);
+    }
+    return true;
+  }
+
   bool HandleCDMProxyReady() override
   {
     SetState(DECODER_STATE_DECODING_FIRSTFRAME);