[Android WebView] Send WebChromeClient.onReceivedTitle when navigating back

[Android WebView] Send WebChromeClient.onReceivedTitle when navigating back

The usual channel for delivering onReceivedTitle (via updating title for
a NavigationEntry) doesn't work in the case of history navigations, because
WebContentsImpl silences no-op updates of entries titles.

Chrome Browser uses another event for updating the title in this case --
via WebContentsDelegate::LoadingStateChanged. This patch enables WebView to
use it as well.

Note that WebChromeClient.onReceivedIcon doesn't need to be re-sent, as
nobody seems to bother checking whether the icon update is a "no-op", so
updates on history navigations just work.

BUG=481570
Committed: https://crrev.com/38d1092ea27df0818a8a20b114fcf0cac9018a68
Cr-Commit-Position: refs/heads/master@{#329408}

[mnaganov (inactive), 2015-05-12 00:21:27]

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

[Torne, 2015-05-12 10:35:49]

lgtm

[mnaganov (inactive), 2015-05-12 14:14:09]

The CQ bit was checked by mnaganov@chromium.org

[commit-bot: I haz the power, 2015-05-12 14:14:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1126383005/1

[commit-bot: I haz the power, 2015-05-12 15:07:27]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-12 15:08:13]

Patchset 1 (id:??) landed as
https://crrev.com/38d1092ea27df0818a8a20b114fcf0cac9018a68
Cr-Commit-Position: refs/heads/master@{#329408}