MacViews: Implement Force Touch/Mac dictionary lookup for Textfields.

ui/gfx/render_text_mac.mm

Index: ui/gfx/render_text_mac.mm
diff --git a/ui/gfx/render_text_mac.mm b/ui/gfx/render_text_mac.mm
index e380333c8c88f471ac158b6c5f30bfc043d3d371..0fbc09a0e7cf86972e2906f3e10d1c4d9891d179 100644
--- a/ui/gfx/render_text_mac.mm
+++ b/ui/gfx/render_text_mac.mm
@@ -64,23 +64,6 @@
 
 namespace gfx {
 
-namespace internal {
-
-// Note: this is only used by RenderTextHarfbuzz.
-sk_sp<SkTypeface> CreateSkiaTypeface(const Font& font,
-                                     bool italic,
-                                     Font::Weight weight) {
-  const Font::FontStyle style = italic ? Font::ITALIC : Font::NORMAL;
-  Font font_with_style = font.Derive(0, style, weight);
-  if (!font_with_style.GetNativeFont())
-    return nullptr;
-
-  return sk_sp<SkTypeface>(SkCreateTypefaceFromCTFont(
-      base::mac::NSToCFCast(font_with_style.GetNativeFont())));
-}
-
-}  // namespace internal
-
 RenderTextMac::RenderTextMac() : common_baseline_(0), runs_valid_(false) {}
 
 RenderTextMac::~RenderTextMac() {}
@@ -448,4 +431,17 @@
   runs_valid_ = false;
 }
 
+bool RenderTextMac::GetStyledStringForRange(
+    const Range& range,
+    NSMutableAttributedString* str) const {
+  // TODO(karandeepb): This is not invoked on any codepath currently. Style the
+  // returned string if need be.
+  if (obscured())
+    return false;
+
+  [[str mutableString]
+      setString:base::SysUTF16ToNSString(GetTextFromRange(range))];
+  return true;
+}
+
 }  // namespace gfx