Update uses of UTF conversions in content/ to use the base:: namespace.

content/renderer/pepper/pepper_truetype_font_win.cc

Index: content/renderer/pepper/pepper_truetype_font_win.cc
diff --git a/content/renderer/pepper/pepper_truetype_font_win.cc b/content/renderer/pepper/pepper_truetype_font_win.cc
index 6d040445dd8fa24eb32b5269f5c854ba8ee3dcb0..edd503ab41b70d954efcb4f804376e67bf73e11b 100644
--- a/content/renderer/pepper/pepper_truetype_font_win.cc
+++ b/content/renderer/pepper/pepper_truetype_font_win.cc
@@ -83,7 +83,7 @@ PepperTrueTypeFontWin::PepperTrueTypeFontWin(
                      CLIP_DEFAULT_PRECIS,
                      DEFAULT_QUALITY,
                      pitch_and_family,
-                     UTF8ToUTF16(desc.family).c_str());
+                     base::UTF8ToUTF16(desc.family).c_str());
 }
 
 PepperTrueTypeFontWin::~PepperTrueTypeFontWin() {
@@ -131,7 +131,7 @@ int32_t PepperTrueTypeFontWin::Describe(
     base::win::ScopedSelectObject select_object(hdc, font_);
     WCHAR name[LF_FACESIZE];
     GetTextFace(hdc, LF_FACESIZE, name);
-    desc->family = UTF16ToUTF8(name);
+    desc->family = base::UTF16ToUTF8(name);
   }
   return PP_OK;
 }