Fix SkTFits in to work properly with signed/unsigned mixtures.

gyp/utils.gyp

 # Gyp for utils.
 {
   'targets': [
     {
       'target_name': 'utils',
       'product_name': 'skia_utils',
       'type': 'static_library',
       'standalone_static_library': 1,
       'include_dirs': [
         '../include/config',
@@ skipping 78 matching lines @@
         '../src/utils/SkSHA1.h',
         '../src/utils/SkRTConf.cpp',
         '../src/utils/SkThreadUtils.h',
         '../src/utils/SkThreadUtils_pthread.cpp',
         '../src/utils/SkThreadUtils_pthread.h',
         '../src/utils/SkThreadUtils_pthread_linux.cpp',
         '../src/utils/SkThreadUtils_pthread_mach.cpp',
         '../src/utils/SkThreadUtils_pthread_other.cpp',
         '../src/utils/SkThreadUtils_win.cpp',
         '../src/utils/SkThreadUtils_win.h',
+        '../src/utils/SkTFitsIn.h',
+        '../src/utils/SkTLogic.h',
         '../src/utils/SkUnitMappers.cpp',
 
         #mac
         '../include/utils/mac/SkCGUtils.h',
         '../src/utils/mac/SkCreateCGImageRef.cpp',
 
         #windows
         '../include/utils/win/SkAutoCoInitialize.h',
         '../include/utils/win/SkHRESULT.h',
         '../include/utils/win/SkIStream.h',
@@ skipping 104 matching lines @@
       },
     },
   ],
 }
 
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