bluetooth: Don't call methods of WebContentsImpl while it's being destroyed.

content/browser/web_contents/web_contents_impl.h

Index: content/browser/web_contents/web_contents_impl.h
diff --git a/content/browser/web_contents/web_contents_impl.h b/content/browser/web_contents/web_contents_impl.h
index bfd6a000a2413f954daaa3d58e1d4f67d6199e22..553492a44e4fc4e8dead93359fa88d6d6aeb6dc5 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -291,8 +291,6 @@ class CONTENT_EXPORT WebContentsImpl
   int GetCapturerCount() const override;
   bool IsAudioMuted() const override;
   void SetAudioMuted(bool mute) override;
-  void IncrementBluetoothConnectedDeviceCount();
-  void DecrementBluetoothConnectedDeviceCount();
   bool IsConnectedToBluetoothDevice() const override;
   bool IsCrashed() const override;
   void SetIsCrashed(base::TerminationStatus status, int error_code) override;
@@ -754,6 +752,10 @@ class CONTENT_EXPORT WebContentsImpl
                        int active_match_ordinal,
                        bool final_update);
 
+  // The following two methods have no effect while IsBeingDestroyed is true.

[ncarter (slow), 2016/06/08 19:15:35]

This is an implementation detail that doesn't belong in the header comment. The
header comment should describe the purpose of these methods.

[ortuno, 2016/06/09 17:40:02]

Done.

+  void IncrementBluetoothConnectedDeviceCount();
+  void DecrementBluetoothConnectedDeviceCount();
+
 #if defined(OS_ANDROID)
   // Called by FindRequestManager when all of the find match rects are in.
   void NotifyFindMatchRectsReply(int version,