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

content/renderer/render_view_impl_unittest.cc

Index: content/renderer/render_view_impl_unittest.cc
diff --git a/content/renderer/render_view_impl_unittest.cc b/content/renderer/render_view_impl_unittest.cc
index 971a4fb20370fd1ad4d3635cfde77349aa397978..65389f7a4d2e6b2fd1a9353d41f31b7c5567f428 100644
--- a/content/renderer/render_view_impl_unittest.cc
+++ b/content/renderer/render_view_impl_unittest.cc
@@ -28,10 +28,10 @@ TEST(RenderViewImplTest, ShouldUpdateSelectionTextFromContextMenuParams) {
 
   ContextMenuParams params;
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(cases); ++i) {
-    params.selection_text = UTF8ToUTF16(cases[i].params_selection_text);
+    params.selection_text = base::UTF8ToUTF16(cases[i].params_selection_text);
     EXPECT_EQ(cases[i].expected_result,
               RenderViewImpl::ShouldUpdateSelectionTextFromContextMenuParams(
-                  UTF8ToUTF16(cases[i].selection_text),
+                  base::UTF8ToUTF16(cases[i].selection_text),
                   cases[i].selection_text_offset,
                   cases[i].selection_range,
                   params));