Move more uses of string16 to specify base::

ui/base/text/bytes_formatting.h

Index: ui/base/text/bytes_formatting.h
diff --git a/ui/base/text/bytes_formatting.h b/ui/base/text/bytes_formatting.h
index 2b0f517e5a76b064667dfbac6ba71e24cc2a1c32..0e818183385259597e9ad72dbd24997fe6b509c0 100644
--- a/ui/base/text/bytes_formatting.h
+++ b/ui/base/text/bytes_formatting.h
@@ -16,12 +16,12 @@ namespace ui {
 // Simple call to return a byte quantity as a string in human-readable format.
 // Ex: FormatBytes(512) => "512 B"
 // Ex: FormatBytes(101479) => "99.1 kB"
-UI_EXPORT string16 FormatBytes(int64 bytes);
+UI_EXPORT base::string16 FormatBytes(int64 bytes);
 
 // Simple call to return a speed as a string in human-readable format.
 // Ex: FormatSpeed(512) => "512 B/s"
 // Ex: FormatSpeed(101479) => "99.1 kB/s"
-UI_EXPORT string16 FormatSpeed(int64 bytes);
+UI_EXPORT base::string16 FormatSpeed(int64 bytes);
 
 // Less-Simple API -------------------------------------------------------------
 
@@ -43,13 +43,16 @@ UI_EXPORT DataUnits GetByteDisplayUnits(int64 bytes);
 // unit suffix. Specify in the |units| argument the units to be used.
 // Ex: FormatBytes(512, DATA_UNITS_KIBIBYTE, true) => "0.5 kB"
 // Ex: FormatBytes(10*1024, DATA_UNITS_MEBIBYTE, false) => "0.1"
-UI_EXPORT string16 FormatBytesWithUnits(int64 bytes, DataUnits units,
-                                        bool show_units);
+UI_EXPORT base::string16 FormatBytesWithUnits(int64 bytes,
+                                              DataUnits units,
+                                              bool show_units);
 
 // As above, but with "/s" units for speed values.
 // Ex: FormatSpeed(512, DATA_UNITS_KIBIBYTE, true) => "0.5 kB/s"
 // Ex: FormatSpeed(10*1024, DATA_UNITS_MEBIBYTE, false) => "0.1"
-string16 FormatSpeedWithUnits(int64 bytes, DataUnits units, bool show_units);
+base::string16 FormatSpeedWithUnits(int64 bytes,
+                                    DataUnits units,
+                                    bool show_units);
 
 }  // namespace ui