[Rev 01] RFR: 8241370: Crash in JPEGImageLoader after fix for JDK-8212034

[Ambarish Rapte]

> This is a regression of [JDK-8212034](https://bugs.openjdk.java.net/browse/JDK-8212034).
> When image is loaded in WebView usinga url, WebView attempts to load a image frames with partial image data. This was
> implemented under, JDK-8153148 -> WCImageDecoderImpl.addImageData() -> calls loadFrames() with partial image data.
> 
> Call to jpeg_read_header() may fail when the partial image data has incomplete header information.
> 
> In the given case the jpeg_read_header() call fails and code execution flow enters the 'if
> (setjmp(jerr->setjmp_buffer)) {}' block and results in call to disposeIIO(env, data);, which in turn calls
> imageio_dispose. This will free cinfo->err and set it to NULL, and the subsequent call to (*cinfo->err->format_message)
> crashes.  Verified All test run, Sanity tests with Ensemble app and Tested different web pages. Added a test, The test
> passes with fix and causes a native crash without the fix.

Ambarish Rapte has updated the pull request incrementally with one additional commit since the last revision:

  Fixed reiew comments on test

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

Changes:
  - all: https://git.openjdk.java.net/jfx/pull/154/files
  - new: https://git.openjdk.java.net/jfx/pull/154/files/49cb0f36..a452cd62

Webrevs:
 - full: https://webrevs.openjdk.java.net/jfx/154/webrev.01
 - incr: https://webrevs.openjdk.java.net/jfx/154/webrev.00-01

  Stats: 235 lines in 3 files changed: 110 ins; 125 del; 0 mod
  Patch: https://git.openjdk.java.net/jfx/pull/154.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/154/head:pull/154

PR: https://git.openjdk.java.net/jfx/pull/154