Move SkStringUtils.h to src/core.

gyp/core.gypi

 # Include this gypi to include all 'core' files
 # The parent gyp/gypi file must define
 #       'skia_src_path'     e.g. skia/trunk/src
 #       'skia_include_path' e.g. skia/trunk/include
 #
 # The skia build defines these in common_variables.gypi
 #
 {
     'sources': [
         '<(skia_src_path)/core/SkAAClip.cpp',
@@ skipping 268 matching lines @@
         '<(skia_include_path)/core/SkRasterizer.h',
         '<(skia_include_path)/core/SkReader32.h',
         '<(skia_include_path)/core/SkRect.h',
         '<(skia_include_path)/core/SkRefCnt.h',
         '<(skia_include_path)/core/SkRegion.h',
         '<(skia_include_path)/core/SkRRect.h',
         '<(skia_include_path)/core/SkScalar.h',
         '<(skia_include_path)/core/SkShader.h',
         '<(skia_include_path)/core/SkStream.h',
         '<(skia_include_path)/core/SkString.h',
-        '<(skia_include_path)/core/SkStringUtils.h',
         '<(skia_include_path)/core/SkStrokeRec.h',
         '<(skia_include_path)/core/SkSurface.h',
         '<(skia_include_path)/core/SkTArray.h',
         '<(skia_include_path)/core/SkTDArray.h',
         '<(skia_include_path)/core/SkTDStack.h',
         '<(skia_include_path)/core/SkTDict.h',
         '<(skia_include_path)/core/SkTInternalLList.h',
         '<(skia_include_path)/core/SkTRegistry.h',
         '<(skia_include_path)/core/SkTSearch.h',
         '<(skia_include_path)/core/SkTemplates.h',
@@ skipping 63 matching lines @@
         '<(skia_src_path)/pathops/SkPathOpsPoint.h',
         '<(skia_src_path)/pathops/SkPathOpsQuad.h',
         '<(skia_src_path)/pathops/SkPathOpsRect.h',
         '<(skia_src_path)/pathops/SkPathOpsTriangle.h',
         '<(skia_src_path)/pathops/SkPathOpsTypes.h',
         '<(skia_src_path)/pathops/SkPathWriter.h',
         '<(skia_src_path)/pathops/SkQuarticRoot.h',
         '<(skia_src_path)/pathops/SkReduceOrder.h',
     ],
 }