> Encapsulate the logic of adding or modifying a notification icon aka tray 
> icon. This is to avoid code duplication between 
> [`AwtTrayIcon::WmTaskbarCreated`](https://github.com/openjdk/jdk/blob/7b988b31c661c6e3e58cf8ced81732e40a79d4f5/src/java.desktop/windows/native/libawt/windows/awt_TrayIcon.cpp#L477)
>  and 
> [`AwtTrayIcon::_UpdateIcon`](https://github.com/openjdk/jdk/blob/7b988b31c661c6e3e58cf8ced81732e40a79d4f5/src/java.desktop/windows/native/libawt/windows/awt_TrayIcon.cpp#L796).
> 
> Separating adding and modifying the icon simplifies the methods, the actions 
> are clearer: adding the icon requires sending `NIM_SETVERSION` message 
> whereas modifying the icon doesn't.
> 
> To verify the code works as before, I used `TrayIconScalingTest.java`. I 
> killed explorer.exe process to verify the notification icon gets added. 
> Changing DPI of the main display updates the displayed icon as expected.

Alexey Ivanov has updated the pull request incrementally with two additional 
commits since the last revision:

 - Inline AddTrayIcon and ModifyTrayIcon
 - Make SendTrayMessage private - it's used internally only

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8749/files
  - new: https://git.openjdk.java.net/jdk/pull/8749/files/67625852..52f5ecae

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8749&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8749&range=01-02

  Stats: 28 lines in 2 files changed: 11 ins; 15 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8749.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8749/head:pull/8749

PR: https://git.openjdk.java.net/jdk/pull/8749

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