Android WebView: make sure libwebview target isn't mangled.

Android WebView: make sure libwebview target isn't mangled.

The android gyp backend has been updated to introduce an
"android_unmangled_name" target option, which allows the backend to skip
mangling the name of designated targets. Turn this on for libwebview in
order that it's generated as libwebview.so instead of
lib_android_webview_libwebview_gyp.so which was rather confusing.

BUG=

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=162410

[Torne, 2012-10-17 14:04:53]

I've submitted the gyp change for this and rolled it into Chromium's DEPS, so
now we should be able to turn this on for the libwebview target. It just does
nothing on the other backends that don't understand this option.

[benm (inactive), 2012-10-17 14:45:46]

lgtm