Remove unused resources that tested window.history cross-origin access.

The tests that used these resources were removed in
http://crrev.com/14198015.

BUG=237080

Review URL: https://codereview.chromium.org/497683002

git-svn-id: svn://svn.chromium.org/blink/trunk@180762 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove SpeechSynthesis runtime flag (status=stable)

BUG=402536

Review URL: https://codereview.chromium.org/482273005

git-svn-id: svn://svn.chromium.org/blink/trunk@180763 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Fix diff generation by difflib to report missing end of file newlines.

The diff generated by the difflib is incorrect if one of the files
does not have a newline at the end of the file and the last lines
are different. Relevant Python issue: http://bugs.python.org/issue2142

BUG=398435
TEST=test-webkitpy

Review URL: https://codereview.chromium.org/423073004

git-svn-id: svn://svn.chromium.org/blink/trunk@180764 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Test tidying: use "escape" and "backspace" with eventSender.keyDown()

R=keishi@chromium.org,yosin@chromium.org
BUG=392517
NOTRY=true

Review URL: https://codereview.chromium.org/484353004

git-svn-id: svn://svn.chromium.org/blink/trunk@180765 bbb929c8-8fbe-4397-9dbb-9b2b20218538