Rebaseline bindings test results after r159430

Rebaseline bindings test results after r159430. ScriptExecutionContext was
renamed to ExecutionContext.

NOTRY=true
TBR=morrita
BUG=

Review URL: https://codereview.chromium.org/26841008

git-svn-id: svn://svn.chromium.org/blink/trunk@159454 bbb929c8-8fbe-4397-9dbb-9b2b20218538