Allow default font size changing on Linux.

content/renderer/render_view_linux.cc

Index: content/renderer/render_view_linux.cc
diff --git a/content/renderer/render_view_linux.cc b/content/renderer/render_view_linux.cc
index f4ef02e743577ae6aea983313dc4e876b9f77b26..8b08dce2c8b1cda6b751ab986c149dc93d81fac0 100644
--- a/content/renderer/render_view_linux.cc
+++ b/content/renderer/render_view_linux.cc
@@ -90,6 +90,8 @@ void RenderViewImpl::UpdateFontRenderingFromRendererPrefs() {
       prefs.subpixel_rendering !=
       gfx::FontRenderParams::SUBPIXEL_RENDERING_NONE);
   WebFontRendering::setSubpixelPositioning(prefs.use_subpixel_positioning);
+  if (prefs.default_font_size)
+    WebFontRendering::setDefaultFontSize(prefs.default_font_size);

[jln (very slow on Chromium), 2014/09/15 19:25:09]

Could you add some basic sanity-checking on the font size here before passing it
to WebFontRenderering? (Maybe checking that it's between 0 and 1000 for
instance).

 }
 
 }  // namespace content