linux: simplify gfx::Font constructor logic and add CHECK()s.

app/gfx/font_skia.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "app/gfx/font.h"
 
 #include "app/gfx/canvas.h"
 
 #include "base/logging.h"
 #include "base/sys_string_conversions.h"
@@ skipping 67 matching lines @@
 
 int Font::ave_char_width() const {
   return avg_width_;
 }
 
 Font Font::CreateFont(const std::wstring& font_family, int font_size) {
   DCHECK_GT(font_size, 0);
 
   SkTypeface* tf = SkTypeface::CreateFromName(
       base::SysWideToUTF8(font_family).c_str(), SkTypeface::kNormal);
-  DCHECK(tf) << "Could not find font: " << base::SysWideToUTF8(font_family);
+  // Temporary CHECK for tracking down
+  // http://code.google.com/p/chromium/issues/detail?id=12530
+  CHECK(tf) << "Could not find font: " << base::SysWideToUTF8(font_family);
   SkAutoUnref tf_helper(tf);
 
   return Font(tf, font_family, font_size, NORMAL);
 }
 
 Font Font::DeriveFont(int size_delta, int style) const {
   // If the delta is negative, if must not push the size below 1
   if (size_delta < 0) {
     DCHECK_LT(-size_delta, font_size_);
   }
@@ skipping 50 matching lines @@
 
 int Font::FontSize() {
   return font_size_;
 }
 
 NativeFont Font::nativeFont() const {
   return typeface_;
 }
 
 }  // namespace gfx