Change SkStream.

gyp/ports.gyp

 # Port-specific Skia library code.
 {
   'targets': [
     {
       'target_name': 'ports',
       'product_name': 'skia_ports',
       'type': 'static_library',
       'standalone_static_library': 1,
       'dependencies': [
         'core.gyp:core',
@@ skipping 13 matching lines @@
         '../src/ports/SkDebug_nacl.cpp',
         '../src/ports/SkDebug_stdio.cpp',
         '../src/ports/SkDebug_win.cpp',
         '../src/ports/SkFontHost_win.cpp',
         '../src/ports/SkFontHost_win_dw.cpp',
         '../src/ports/SkGlobalInitialization_default.cpp',
         '../src/ports/SkPurgeableMemoryBlock_none.cpp',
         '../src/ports/SkThread_win.cpp',
 
         '../src/ports/SkMemory_malloc.cpp',
+        '../src/ports/SkOSFile_posix.cpp',
         '../src/ports/SkOSFile_stdio.cpp',
+        '../src/ports/SkOSFile_win.cpp',
         '../src/ports/SkTime_Unix.cpp',
         '../src/ports/SkTime_win.cpp',
         '../src/ports/SkXMLParser_empty.cpp',
       ],
       'conditions': [
         [ 'skia_os in ["linux", "freebsd", "openbsd", "solaris"]', {
           'defines': [
             #The font host requires at least FreeType 2.3.0 at runtime.
             'SK_FONTHOST_FREETYPE_RUNTIME_VERSION=0x020300',\
             'SK_CAN_USE_DLOPEN=1',
@@ skipping 88 matching lines @@
                 ],
               }, { # else !skia_directwrite
                 'sources!': [
                   '../src/ports/SkFontHost_win_dw.cpp',
                 ],
               }],
           ],
           'sources!': [ # these are used everywhere but windows
             '../src/ports/SkDebug_stdio.cpp',
             '../src/ports/SkTime_Unix.cpp',
+            '../src/ports/SkOSFile_posix.cpp',
           ],
         }, { # else !win
           'sources!': [
             '../src/ports/SkDebug_win.cpp',
             '../src/ports/SkFontHost_win.cpp',
             '../src/ports/SkFontHost_win_dw.cpp',
+            '../src/ports/SkOSFile_win.cpp',
             '../src/ports/SkThread_win.cpp',
             '../src/ports/SkTime_win.cpp',
           ],
         }],
         [ 'skia_os == "android"', {
           'defines': [
             #Android provides at least FreeType 2.4.0 at runtime.
             'SK_FONTHOST_FREETYPE_RUNTIME_VERSION=0x020400',
             #Skia should not use dlopen on Android.
             'SK_CAN_USE_DLOPEN=0',
@@ skipping 24 matching lines @@
       },
     },
   ],
 }
 
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