PlatformFontWin::DeriveFontWithHeight insensitive to base font's height

ui/gfx/platform_font_win_unittest.cc

Index: ui/gfx/platform_font_win_unittest.cc
diff --git a/ui/gfx/platform_font_win_unittest.cc b/ui/gfx/platform_font_win_unittest.cc
index 1ecdde1d352db9d7b25e5a6c3ee62be48d79ca0a..08e5d0840a58965faeed4a2b43bbd7b1e1b858df 100644
--- a/ui/gfx/platform_font_win_unittest.cc
+++ b/ui/gfx/platform_font_win_unittest.cc
@@ -69,6 +69,22 @@ TEST(PlatformFontWinTest, DeriveFontWithHeight) {
   }
 }
 
+TEST(PlatformFontWinTest, DeriveFontWithHeight_Consistency) {
+  gfx::Font arial_12("Arial", 12);
+  ASSERT_GT(16, arial_12.GetHeight());
+  gfx::Font derived_1 = static_cast<PlatformFontWin*>(
+      arial_12.platform_font())->DeriveFontWithHeight(16, 0);
+
+  gfx::Font arial_15("Arial", 15);
+  ASSERT_LT(16, arial_15.GetHeight());
+  gfx::Font derived_2 = static_cast<PlatformFontWin*>(
+      arial_15.platform_font())->DeriveFontWithHeight(16, 0);
+
+  EXPECT_EQ(derived_1.GetFontSize(), derived_2.GetFontSize());
+  EXPECT_EQ(16, derived_1.GetHeight());
+  EXPECT_EQ(16, derived_2.GetHeight());
+}
+
 // Callback function used by DeriveFontWithHeight_MinSize() below.
 static int GetMinFontSize() {
   return 10;