Get rid of redundant member function Editor::didBeginEditing()

This patch removes member function Editor::didBeginEditing(), which calls
SpellChecker::didBeginEditing() to reduce source code size of Editor class for
ease of maintenance.

BUG=n/a
TEST=n/a; no behavior changes

Review URL: https://codereview.chromium.org/59153011

git-svn-id: svn://svn.chromium.org/blink/trunk@162421 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Mark virtual/web-animations-css/animations/play-state-initially-paused.html as flaky

BUG=321841
TEST=
TBR=dglazkov@chromium.org

Review URL: https://codereview.chromium.org/77423003

git-svn-id: svn://svn.chromium.org/blink/trunk@162422 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Fix compile with gcc-4.4

These are the only changes that need to be made to Blink to compile
with gcc-4.4.

BUG=none

Review URL: https://codereview.chromium.org/71473005

git-svn-id: svn://svn.chromium.org/blink/trunk@162423 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Revert 162362 "File constructor understands lastModified."

Likely causing fast/files/file-constructor.html to be flaky on windows
(reliably faling on XP)

See http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20Blink&showExpectations=true&tests=fast%2Ffiles%2Ffile-constructor.html

> File constructor understands lastModified.
> 
> BUG=164933
> 
> Review URL: https://codereview.chromium.org/74213009

TBR=costan@gmail.com

Review URL: https://codereview.chromium.org/79343006

git-svn-id: svn://svn.chromium.org/blink/trunk@162424 bbb929c8-8fbe-4397-9dbb-9b2b20218538