Move a bunch of windows stuff from ui/base/win to ui/gfx/win

ui/gfx/utf16_indexing_unittest.cc

Index: ui/gfx/utf16_indexing_unittest.cc
diff --git a/ui/base/text/utf16_indexing_unittest.cc b/ui/gfx/utf16_indexing_unittest.cc
similarity index 94%
rename from ui/base/text/utf16_indexing_unittest.cc
rename to ui/gfx/utf16_indexing_unittest.cc
index 1bf8c30dbce19bb916df23687dfb5eaad5d48db9..da2f8f5b56c23d5032df1cc356063a18e35ac84a 100644
--- a/ui/base/text/utf16_indexing_unittest.cc
+++ b/ui/gfx/utf16_indexing_unittest.cc
@@ -3,9 +3,9 @@
 // found in the LICENSE file.
 
 #include "testing/gtest/include/gtest/gtest.h"
-#include "ui/base/text/utf16_indexing.h"
+#include "ui/gfx/utf16_indexing.h"
 
-namespace ui {
+namespace gfx {
 
 TEST(UTF16IndexingTest, IndexOffsetConversions) {
   // Valid surrogate pair surrounded by unpaired surrogates
@@ -29,4 +29,4 @@ TEST(UTF16IndexingTest, IndexOffsetConversions) {
   }
 }
 
-}  // namespace ui
+}  // namespace gfx