Support invisible underline for IME composition.

ui/base/ime/input_method_chromeos.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/base/ime/input_method_chromeos.h"
 
 #include <algorithm>
 #include <cstring>
 #include <set>
 #include <vector>
@@ skipping 599 matching lines @@
                                      char16_offsets[end],
                                      SK_ColorBLACK,
                                      false /* thick */,
                                      SK_ColorTRANSPARENT);
       if (underline_attributes[i].type ==
           chromeos::CompositionText::COMPOSITION_TEXT_UNDERLINE_DOUBLE)
         underline.thick = true;
       else if (underline_attributes[i].type ==
                chromeos::CompositionText::COMPOSITION_TEXT_UNDERLINE_ERROR)
         underline.color = SK_ColorRED;
+      else if (underline_attributes[i].type ==
+               chromeos::CompositionText::COMPOSITION_TEXT_UNDERLINE_NONE)
+        underline.color = SK_ColorTRANSPARENT;
       out_composition->underlines.push_back(underline);
     }
   }
 
   DCHECK(text.selection_start() <= text.selection_end());
   if (text.selection_start() < text.selection_end()) {
     const uint32 start = text.selection_start();
     const uint32 end = text.selection_end();
     CompositionUnderline underline(char16_offsets[start],
                                    char16_offsets[end],
@@ skipping 20 matching lines @@
         0, length, SK_ColorBLACK, false /* thick */, SK_ColorTRANSPARENT));
   }
 }
 
 bool InputMethodChromeOS::IsInputFieldFocused() {
   TextInputType type = GetTextInputType();
   return (type != TEXT_INPUT_TYPE_NONE) && (type != TEXT_INPUT_TYPE_PASSWORD);
 }
 
 }  // namespace ui