RFR: 8288325: [windows] Actual and Preferred Size of AWT Non-resizable frame are different [v8]

[Harshitha Onkar]

> On Windows, the insets obtained for a Non-Resizable AWT Frame was different when frame.pack() was called and subsequent call to frame.getInsets() or frame.getPreferredSize(). Due to this, the actual and preferred size differed when frame.pack() was called for Non-Resizable frame (on Windows).  
> 
> Earlier the insets returned when frame.getInsets() was called, was that of a Resizable frame and not the correct insets associated with Non-Resizable frame. Fix is added to native code to get the correct insets. The test - AwtFramePackTest.java has been updated to test actual and expected/preferred size for both Resizable and Non-Resizable Frames.
> 
> The test is generic though the issue and fix is on Windows platform because the condition 
> `frame.getSize() == frame.getPreferredSize()` should be true on all platforms when frame.pack() is called.
> 
> Following is the link to Windows System Metrics (used for native insets) - https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getsystemmetrics

Harshitha Onkar has updated the pull request incrementally with one additional commit since the last revision:

  removed unused extraBottomInsets, code cleanup

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Changes:
  - all: https://git.openjdk.org/jdk/pull/9954/files
  - new: https://git.openjdk.org/jdk/pull/9954/files/b6f90abb..edcb53a1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9954&range=07
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9954&range=06-07

  Stats: 3 lines in 1 file changed: 0 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/9954.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9954/head:pull/9954

PR: https://git.openjdk.org/jdk/pull/9954