Font fallback for UI

ui/gfx/text_elider_unittest.cc

 // Copyright (c) 2012 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.
 //
 // Unit tests for eliding and formatting utility functions.
 
 #include "ui/gfx/text_elider.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/i18n/rtl.h"
 #include "base/macros.h"
+#include "base/run_loop.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/font.h"
 #include "ui/gfx/font_list.h"
 #include "ui/gfx/font_render_params.h"
 #include "ui/gfx/text_utils.h"
 
 using base::ASCIIToUTF16;
@@ skipping 296 matching lines @@
 
 // Test that both both UTF-16 surrogate pairs and combining character sequences
 // do not get split by ElideText.
 // TODO(crbug.com/338784): Enable this on android.
 #if defined(OS_ANDROID)
 #define MAYBE_ElideTextAtomicSequences DISABLED_ElideTextAtomicSequences
 #else
 #define MAYBE_ElideTextAtomicSequences ElideTextAtomicSequences
 #endif
 TEST(TextEliderTest, MAYBE_ElideTextAtomicSequences) {
+#if defined(OS_WIN)
+  // Needed to bypass DCHECK in GetFallbackFont.
+  base::MessageLoopForUI message_loop;
+#endif
   const FontList font_list;
   // The below is 'MUSICAL SYMBOL G CLEF' (U+1D11E), which is represented in
   // UTF-16 as two code units forming a surrogate pair: 0xD834 0xDD1E.
   const base::char16 kSurrogate[] = {0xD834, 0xDD1E, 0};
   // The below is a Devanagari two-character combining sequence U+0921 U+093F.
   // The sequence forms a single display character and should not be separated.
   const base::char16 kCombiningSequence[] = {0x921, 0x93F, 0};
   std::vector<base::string16> pairs;
   pairs.push_back(kSurrogate);
   pairs.push_back(kCombiningSequence);
@@ skipping 794 matching lines @@
 
   // Test breaking in the middle of the first word, with leading whitespace.
   EXPECT_EQ(L"\x2026", UTF16ToWide(TruncateString(str2, 4, WORD_BREAK)));
   EXPECT_EQ(L"\x2026", UTF16ToWide(TruncateString(str2, 4, CHARACTER_BREAK)));
   EXPECT_EQ(L"   f\x2026", UTF16ToWide(TruncateString(str2, 5, WORD_BREAK)));
   EXPECT_EQ(L"   f\x2026",
             UTF16ToWide(TruncateString(str2, 5, CHARACTER_BREAK)));
 }
 
 }  // namespace gfx