Don't show "Saving...0%" status until saving actually started

This fixes the problem that heap snapshot status is changed to "Saving...0%" before file name is confirmed.

Drive-by: removing some unused fields.

BUG=None
R=eustas@chromium.org

Review URL: https://codereview.chromium.org/23717025

git-svn-id: svn://svn.chromium.org/blink/trunk@157110 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Return a reference instead of a pointer in Node::treeScope().

BUG=none
R=hayato@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23878003

git-svn-id: svn://svn.chromium.org/blink/trunk@157111 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Delete some unused functions in core/platform/Language.*.

BUG=none
TEST=none; no behavior changes.

Review URL: https://chromiumcodereview.appspot.com/23479019

git-svn-id: svn://svn.chromium.org/blink/trunk@157112 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Move platform/chromium/LocalizedStringsChromium.cpp to platform/LocalizedStrings.cpp.

No need to use chromium directory and Chromium suffix.

BUG=none
TEST=none; no behavior changes.

Review URL: https://chromiumcodereview.appspot.com/23715005

git-svn-id: svn://svn.chromium.org/blink/trunk@157113 bbb929c8-8fbe-4397-9dbb-9b2b20218538