[Omnibox] Elide omnibox text

ui/gfx/render_text.h

 // 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.
 
 #ifndef UI_GFX_RENDER_TEXT_H_
 #define UI_GFX_RENDER_TEXT_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 153 matching lines @@
   Range char_range;
 
   // Index of the text run that generated this segment.
   size_t run;
 
   // Returns the width of this line segment in text space.
   float width() const { return x_range.length(); }
 };
 
 // A line of display text, comprised of a line segment list and some metrics.
-struct Line {
+ struct GFX_EXPORT Line {
   Line();
   Line(const Line& other);
   ~Line();
 
   // Segments that make up this line in visual order.
   std::vector<LineSegment> segments;
 
   // The sum of segment widths and the maximum of segment heights.
   SizeF size;
 
@@ skipping 672 matching lines @@
   // Lines computed by EnsureLayout. These should be invalidated upon
   // OnLayoutTextAttributeChanged and OnDisplayTextAttributeChanged calls.
   std::vector<internal::Line> lines_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderText);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_RENDER_TEXT_H_