Add textfield internal padding from FocusableBorder.

ui/views/controls/textfield/textfield.cc

Index: ui/views/controls/textfield/textfield.cc
diff --git a/ui/views/controls/textfield/textfield.cc b/ui/views/controls/textfield/textfield.cc
index bedee3a1c0c8cabcece0a1f5d192c79e9f5d5191..d6af7d53a434638b14303a84a2b4b777cb8727e6 100644
--- a/ui/views/controls/textfield/textfield.cc
+++ b/ui/views/controls/textfield/textfield.cc
@@ -238,6 +238,7 @@ int GetViewsCommand(const ui::TextEditCommandAuraLinux& command, bool rtl) {
 
 // static
 const char Textfield::kViewClassName[] = "Textfield";
+const int Textfield::kTextPadding = 3;
 
 // static
 size_t Textfield::GetCaretBlinkMs() {
@@ -555,7 +556,8 @@ int Textfield::GetBaseline() const {
 }
 
 gfx::Size Textfield::GetPreferredSize() const {
-  const gfx::Insets& insets = GetInsets();
+  gfx::Insets insets = GetInsets();
+  insets += gfx::Insets(kTextPadding, kTextPadding, kTextPadding, kTextPadding);
   return gfx::Size(GetFontList().GetExpectedTextWidth(default_width_in_chars_) +
                    insets.width(), GetFontList().GetHeight() + insets.height());
 }
@@ -919,7 +921,14 @@ void Textfield::GetAccessibleState(ui::AXViewState* state) {
 }
 
 void Textfield::OnBoundsChanged(const gfx::Rect& previous_bounds) {
-  GetRenderText()->SetDisplayRect(GetContentsBounds());
+  // Textfield preferred sizing includes a reasonable amount of whitespace on
+  // all sides of the default font list. Fallback fonts with larger heights may
+  // paint over the vertical whitespace as needed. Alternate solutions involve
+  // undesirable behavior like changing the default font size, shrinking some
+  // fallback fonts beyond their legibility, or enlarging controls dynamically.
+  gfx::Rect bounds = GetContentsBounds();
+  bounds.Inset(kTextPadding, 0);
+  GetRenderText()->SetDisplayRect(bounds);
   OnCaretBoundsChanged();
 }