Remove a bunch of dead files found by missing_from_gn

sky/engine/platform/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/ui.gni")
 import("//sky/engine/build/scripts/scripts.gni")
 import("//sky/engine/config.gni")
 
 # Most targets in this file are private actions so use that as the default.
 visibility = [":*"]
@@ skipping 194 matching lines @@
     "animation/KeyframeValueList.cpp",
     "animation/KeyframeValueList.h",
     "animation/TimingFunction.cpp",
     "animation/TimingFunction.h",
     "animation/UnitBezier.h",
     "clipboard/ClipboardMimeTypes.cpp",
     "clipboard/ClipboardMimeTypes.h",
     "clipboard/ClipboardUtilities.cpp",
     "clipboard/ClipboardUtilities.h",
     "clipboard/ClipboardUtilitiesPosix.cpp",
-    "clipboard/ClipboardUtilitiesWin.cpp",
     "exported/Platform.cpp",
     "exported/WebActiveGestureAnimation.cpp",
     "exported/WebActiveGestureAnimation.h",
     "exported/WebArrayBuffer.cpp",
     "exported/WebConvertableToTraceFormat.cpp",
     "exported/WebCursorInfo.cpp",
     "exported/WebData.cpp",
     "exported/WebFilterKeyframe.cpp",
     "exported/WebHTTPBody.cpp",
     "exported/WebHTTPLoadInfo.cpp",
@@ skipping 73 matching lines @@
     "fonts/harfbuzz/HarfBuzzFace.h",
     "fonts/harfbuzz/HarfBuzzFaceCoreText.cpp",
     "fonts/harfbuzz/HarfBuzzFaceSkia.cpp",
     "fonts/harfbuzz/HarfBuzzShaper.cpp",
     "fonts/harfbuzz/HarfBuzzShaper.h",
     "fonts/linux/FontCacheLinux.cpp",
     "fonts/linux/FontPlatformDataLinux.cpp",
     "fonts/opentype/OpenTypeSanitizer.cpp",
     "fonts/opentype/OpenTypeSanitizer.h",
     "fonts/opentype/OpenTypeTypes.h",
-    "fonts/opentype/OpenTypeUtilities.cpp",
-    "fonts/opentype/OpenTypeUtilities.h",
     "fonts/opentype/OpenTypeVerticalData.cpp",
     "fonts/opentype/OpenTypeVerticalData.h",
     "fonts/skia/FontCacheSkia.cpp",
     "fonts/skia/FontCustomPlatformDataSkia.cpp",
     "fonts/skia/FontPlatformDataSkia.cpp",
     "fonts/skia/SimpleFontDataSkia.cpp",
     "geometry/FloatBoxExtent.h",
     "geometry/FloatPolygon.cpp",
     "geometry/FloatPolygon.h",
     "geometry/FloatPoint.cpp",
@@ skipping 254 matching lines @@
     "text/BidiTextRun.h",
     "text/DateTimeFormat.cpp",
     "text/DateTimeFormat.h",
     "text/DecodeEscapeSequences.h",
     "text/LineEnding.cpp",
     "text/LineEnding.h",
     "text/LocaleICU.cpp",
     "text/LocaleICU.h",
     "text/LocaleToScriptMapping.cpp",
     "text/LocaleToScriptMapping.h",
-    "text/LocaleWin.cpp",
-    "text/LocaleWin.h",
     "text/NonCJKGlyphOrientation.h",
     "text/ParserUtilities.h",
     "text/PlatformLocale.cpp",
     "text/PlatformLocale.h",
     "text/QuotedPrintable.cpp",
     "text/QuotedPrintable.h",
     "text/SegmentedString.cpp",
     "text/SegmentedString.h",
     "text/StringTruncator.cpp",
     "text/StringTruncator.h",
@@ skipping 111 matching lines @@
   ]
 
   # FIXME(sky): Can sky use this stuff? Why mac only?
   sources -= [
     # FIXME: We will eventually compile this too, but for now it's
     # only used on mac.
     "fonts/FontPlatformData.cpp",
     "fonts/harfbuzz/HarfBuzzFaceCoreText.cpp",
   ]
 
-  if (is_win) {
-    sources -= [
-      # Uses LocaleWin instead.
-      "text/LocaleICU.cpp",
-      "text/LocaleICU.h",
-    ]
-    cflags = [
-      "/wd4267",  # Conversion from 'size_t' to 'type', possible loss of data.
-      "/wd4334",  # Result of 32-bit shift implicitly converted to 64 bits.
-      "/wd4724",  # Modulo by 0.
-    ]
-  } else {
-    sources -= [
-      "clipboard/ClipboardUtilitiesWin.cpp",
-      "fonts/opentype/OpenTypeUtilities.cpp",
-      "fonts/opentype/OpenTypeUtilities.h",
-      "text/LocaleWin.cpp",
-    ]
-  }
-
   if (is_android) {
     # Add in some Linux files also shared with Android.
     set_sources_assignment_filter([])
     sources += [
       "exported/linux/WebFontRenderStyle.cpp",
       "fonts/linux/FontPlatformDataLinux.cpp",
     ]
     set_sources_assignment_filter(sources_assignment_filter)
   }
 
@@ skipping 147 matching lines @@
     #'cflags': ['-marm'],
     #    'conditions': [
     #      ['OS=="android"', {
     #        'cflags!': ['-mthumb'],
     #      }],
     #    ],
 
     deps = [ ":sky_common" ]
   }
 }