Remove reference to hb-icu which is not built on CrOS

ui/gfx/render_text_harfbuzz.cc

 // Copyright 2014 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 "ui/gfx/render_text_harfbuzz.h"
 
 #include <map>
 
 #include "base/i18n/break_iterator.h"
 #include "base/i18n/char_iterator.h"
-#include "third_party/harfbuzz-ng/src/hb-icu.h"
 #include "third_party/harfbuzz-ng/src/hb.h"
 #include "third_party/icu/source/common/unicode/ubidi.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/skia/include/core/SkTypeface.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/utf16_indexing.h"
 
 #if defined(OS_WIN)
 #include "ui/gfx/font_smoothing_win.h"
 #endif
@@ skipping 285 matching lines @@
   while (char_iterator.Advance()) {
     ScriptSetIntersect(char_iterator.get(), scripts, &scripts_size);
     if (scripts_size == 0U)
       return char_iterator.array_pos();
     *script = scripts[0];
   }
 
   return length;
 }
 
+// A port of hb_icu_script_to_script because harfbuzz on CrOS is built without
+// hb-icu. See http://crbug.com/356929
+inline hb_script_t ICUScriptToHBScript(UScriptCode script) {
+  if (script == USCRIPT_INVALID_CODE)
+    return HB_SCRIPT_INVALID;
+  return hb_script_from_string(uscript_getShortName(script), -1);
+}
+
 }  // namespace
 
 namespace internal {
 
 TextRunHarfBuzz::TextRunHarfBuzz()
     : width(0),
       preceding_run_widths(0),
       direction(UBIDI_LTR),
       level(0),
       script(USCRIPT_INVALID_CODE),
@@ skipping 574 matching lines @@
 
   hb_font_t* harfbuzz_font = CreateHarfBuzzFont(run->skia_face.get(),
                                                 run->font_size);
 
   // Create a HarfBuzz buffer and add the string to be shaped. The HarfBuzz
   // buffer holds our text, run information to be used by the shaping engine,
   // and the resulting glyph data.
   hb_buffer_t* buffer = hb_buffer_create();
   hb_buffer_add_utf16(buffer, reinterpret_cast<const uint16*>(text.c_str()),
                       text.length(), run->range.start(), run->range.length());
-  hb_buffer_set_script(buffer, hb_icu_script_to_script(run->script));
+  hb_buffer_set_script(buffer, ICUScriptToHBScript(run->script));
   hb_buffer_set_direction(buffer,
       run->direction == UBIDI_LTR ? HB_DIRECTION_LTR : HB_DIRECTION_RTL);
   // TODO(ckocagil): Should we determine the actual language?
   hb_buffer_set_language(buffer, hb_language_get_default());
 
   // Shape the text.
   hb_shape(harfbuzz_font, buffer, NULL, 0);
 
   // Populate the run fields with the resulting glyph data in the buffer.
   unsigned int glyph_count = 0;
@@ skipping 14 matching lines @@
     run->positions[i].set(run->width + x_offset, y_offset);
     run->width +=
         SkScalarRoundToInt(SkFixedToScalar(hb_positions[i].x_advance));
   }
 
   hb_buffer_destroy(buffer);
   hb_font_destroy(harfbuzz_font);
 }
 
 }  // namespace gfx