Fix fade-truncation of LTR tab titles under RTL UI.

ui/gfx/canvas_skia.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.
 
 #include "ui/gfx/canvas.h"
 
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/base/range/range.h"
@@ skipping 443 matching lines @@
                          desired_characters_to_truncate_from_head,
                          text.length());
         clipped_text = text.substr(desired_characters_to_truncate_from_head);
       }
 
       render_text->set_fade_tail(true);
       render_text->set_fade_head(true);
       break;
   }
 
+  // Default to left alignment unless right alignment was chosen above.
+  if (!(flags & TEXT_ALIGN_RIGHT))
+    flags |= TEXT_ALIGN_LEFT;
+
   gfx::Rect rect = display_rect;
   UpdateRenderText(rect, clipped_text, font, flags, color, render_text.get());
 
   const int line_height = render_text->GetStringSize().height();
   rect.Offset(0, VAlignText(line_height, flags, display_rect.height()));
   rect.set_height(line_height);
   render_text->SetDisplayRect(rect);
 
   canvas_->save(SkCanvas::kClip_SaveFlag);
   ClipRect(display_rect);
   render_text->Draw(this);
   canvas_->restore();
 }
 
 }  // namespace gfx