[WebView] Reword crash handler message.

[WebView] Reword crash handler message.

The current crash handler prints a message on logcat of the form
"### WebView crash. Version ..." whenever a crash is detected in an
Android app which happens to have a WebView.
Due to the in-process nature of the WebView, the crash handler is
triggered regardless of the actual cause of the crash, which might be
totally unrelated with the WebView or the chromium codebase at all.
The current wording is misleading as it erroneously suggests that the
crash is always due to the WebView.

BUG=456485
TBR=torne@chromium.org

Committed: https://crrev.com/86fca587a88a12c485c5b3bfaf7d3029561137af
Cr-Commit-Position: refs/heads/master@{#315210}

[Primiano Tucci (use gerrit), 2015-02-07 15:46:08]

primiano@chromium.org changed reviewers:
+ torne@chromium.org

[Primiano Tucci (use gerrit), 2015-02-07 15:48:46]

The CQ bit was checked by primiano@chromium.org

[commit-bot: I haz the power, 2015-02-07 15:49:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/903363003/1

[commit-bot: I haz the power, 2015-02-07 16:11:13]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-07 16:11:50]

Patchset 1 (id:??) landed as
https://crrev.com/86fca587a88a12c485c5b3bfaf7d3029561137af
Cr-Commit-Position: refs/heads/master@{#315210}

[Torne, 2015-02-08 15:03:34]

LGTM - can you also land this in m40 downstream?