Rebaseline of fast/forms/select-popup/popup-menu-appearance-fractional-width.html

It seems a wrong baseline was checked in. This CL removes one in platform/win7/,
and Windows 7 refers one in platform/win/.

BUG=636258
TBR=keishi@chromium.org
NOTRY=true

Review-Url: https://codereview.chromium.org/2289083002
Cr-Commit-Position: refs/heads/master@{#415242}

third_party/WebKit/LayoutTests/TestExpectations

@@ -1099,8 +1099,6 @@ crbug.com/538717 [ Win Mac Linux ] http/tests/permissions/chromium/test-request-
 crbug.com/543369 [ Linux ] fast/forms/select-popup/popup-menu-appearance-tall.html [ Failure ]
 crbug.com/613510 fast/forms/suggestion-picker/date-suggestion-picker-appearance-rtl.html [ Pass Timeout ]
 
-crbug.com/636258 [ Win7 ] fast/forms/select-popup/popup-menu-appearance-fractional-width.html [ Failure ]
-
 crbug.com/546215 [ Android ] fast/inline-block/overflow-clip.html [ Failure ]
 
 crbug.com/548765 http/tests/inspector/console-fetch-logging.html [ Failure Pass ]