Fix BrowserMediaPlayerManager and BrowserCdmManager destruction order.

content/browser/media/media_web_contents_observer.cc

Index: content/browser/media/media_web_contents_observer.cc
diff --git a/content/browser/media/media_web_contents_observer.cc b/content/browser/media/media_web_contents_observer.cc
index de1fb89adc4f6e24ec7840a00701453f7d4bf819..d23bd3299c5dbbd54d0863b848654e2bbe700e21 100644
--- a/content/browser/media/media_web_contents_observer.cc
+++ b/content/browser/media/media_web_contents_observer.cc
@@ -31,10 +31,12 @@ MediaWebContentsObserver::~MediaWebContentsObserver() {
 void MediaWebContentsObserver::RenderFrameDeleted(
     RenderFrameHost* render_frame_host) {
   uintptr_t key = reinterpret_cast<uintptr_t>(render_frame_host);
-  cdm_managers_.erase(key);
+  // Always destroy the media players before CDMs because we do not support
+  // detaching CDMs from media players yet. See http://crbug.com/330324
 #if defined(OS_ANDROID)
   media_player_managers_.erase(key);
 #endif
+  cdm_managers_.erase(key);
 }
 
 bool MediaWebContentsObserver::OnMessageReceived(