Use views::style for buttons, bootstrap ash_typography to do so.

chrome/browser/ui/views/harmony/layout_delegate_unittest.cc

Index: chrome/browser/ui/views/harmony/layout_delegate_unittest.cc
diff --git a/chrome/browser/ui/views/harmony/layout_delegate_unittest.cc b/chrome/browser/ui/views/harmony/layout_delegate_unittest.cc
index a265ae7d353b08051af86cb5b58c5d0724c13249..248edc3569cd0b2dab12d9ed449635adfda98151 100644
--- a/chrome/browser/ui/views/harmony/layout_delegate_unittest.cc
+++ b/chrome/browser/ui/views/harmony/layout_delegate_unittest.cc
@@ -209,7 +209,7 @@ TEST(LayoutDelegateTest, FontSizeRelativeToBase) {
   EXPECT_EQ(twelve,
             GetFont(views::style::CONTEXT_TEXTFIELD, kStyle).GetFontSize());
   EXPECT_EQ(twelve,
-            GetFont(views::style::CONTEXT_BUTTON, kStyle).GetFontSize());
+            GetFont(views::style::CONTEXT_DIALOG_BUTTON, kStyle).GetFontSize());
 
 #if defined(OS_MACOSX)
   // We never exposed UI on Mac using these constants so it doesn't matter that
@@ -266,6 +266,6 @@ TEST(LayoutDelegateTest, TypographyLineHeight) {
 
   // Buttons should specify zero line height (i.e. use the font's height) so
   // buttons have flexibility to configure their own spacing.
-  EXPECT_EQ(0,
-            views::style::GetLineHeight(views::style::CONTEXT_BUTTON, kStyle));
+  EXPECT_EQ(0, views::style::GetLineHeight(views::style::CONTEXT_DIALOG_BUTTON,
+                                           kStyle));
 }