Adjust ellision strategy for omnibox search chip.

chrome/browser/ui/views/location_bar/location_bar_layout.h

 // Copyright 2013 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 CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_LOCATION_BAR_LAYOUT_H_
 #define CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_LOCATION_BAR_LAYOUT_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 50 matching lines @@
 
   // Second pass of decoration layout process. Pass the |entry_width| computed
   // by the first pass. This pass will adjust it to account for resizable
   // decorations.
   void LayoutPass2(int* entry_width);
 
   // Third and final pass of decoration layout process. Pass the |bounds|
   // corresponding to the entire space available in the location bar. This pass
   // will update it as decorations are laid out. |available_width| measures the
   // empty space within the location bar, taking the decorations and text into
-  // account. |decorations| must always be ordered from the edge of the location
-  // bar towards the middle.
-  void LayoutPass3(gfx::Rect* bounds, int* available_width);
+  // account. When |allow_collapse| is true, decorations may be completely
+  // collapsed (invisible) when there's not enough available width. When
+  // |allow_collapse| is false, decorations won't be smaller than their minimum
+  // width, even if there's not enough room in |available_width|.
+  void LayoutPass3(gfx::Rect* bounds,
+                   int* available_width,
+                   bool allow_collapse);
 
  private:
   // LEFT_EDGE means decorations are added from left to right and stacked on
   // the left of the omnibox, RIGHT_EDGE means the opposite.
   Position position_;
 
   // The default padding between items.
   int item_padding_;
 
   // The padding between the last decoration and the edit box.
   int item_edit_padding_;
 
   // The list of decorations to layout.
   std::vector<std::unique_ptr<LocationBarDecoration>> decorations_;
 
   DISALLOW_COPY_AND_ASSIGN(LocationBarLayout);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_LOCATION_BAR_LAYOUT_H_