ui/gfx: Use base::string16 now that string16 was moved into base namespace.

ui/gfx/text_utils_unittest.cc

Index: ui/gfx/text_utils_unittest.cc
diff --git a/ui/gfx/text_utils_unittest.cc b/ui/gfx/text_utils_unittest.cc
index 5c1941448e72a2edeea4727118e527d55f2d7b2d..1090b388b0488db951dc3b00f995d4c63af303ae 100644
--- a/ui/gfx/text_utils_unittest.cc
+++ b/ui/gfx/text_utils_unittest.cc
@@ -48,10 +48,10 @@ TEST(TextUtilsTest, RemoveAcceleratorChar) {
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(cases); ++i) {
     int accelerated_char_pos;
     int accelerated_char_span;
-    string16 result = RemoveAcceleratorChar(UTF8ToUTF16(cases[i].input),
-                                            kAcceleratorChar,
-                                            &accelerated_char_pos,
-                                            &accelerated_char_span);
+    base::string16 result = RemoveAcceleratorChar(UTF8ToUTF16(cases[i].input),
+                                                  kAcceleratorChar,
+                                                  &accelerated_char_pos,
+                                                  &accelerated_char_span);
     EXPECT_EQ(result, UTF8ToUTF16(cases[i].output));
     EXPECT_EQ(accelerated_char_pos, cases[i].accelerated_char_pos);
     EXPECT_EQ(accelerated_char_span, cases[i].accelerated_char_span);