Bug 1408847 - nsLookAndFeel::GetFontImpl should return Roboto. r=snorp

Our minimum requirement is api-16+ and ICS or later's default font is Roboto.  But nsLookAndFeel::GetFontImpl still returns Droid Sans.  We should return Roboto.

MozReview-Commit-ID: 5VNzQXXp4fa

--HG--
extra : rebase_source : b045c1580faa3204f26d3aa0be89700f2b1abb57

widget/android/nsLookAndFeel.cpp

@@ -456,7 +456,7 @@ nsLookAndFeel::GetFontImpl(FontID aID, nsString& aFontName,
                            gfxFontStyle& aFontStyle,
                            float aDevPixPerCSSPixel)
 {
-    aFontName.AssignLiteral("\"Droid Sans\"");
+    aFontName.AssignLiteral("\"Roboto\"");
     aFontStyle.style = NS_FONT_STYLE_NORMAL;
     aFontStyle.weight = NS_FONT_WEIGHT_NORMAL;
     aFontStyle.stretch = NS_FONT_STRETCH_NORMAL;