cros: Simple password view for lock. Adds test support.

ash/system/tray/size_range_layout.cc

Index: ash/system/tray/size_range_layout.cc
diff --git a/ash/system/tray/size_range_layout.cc b/ash/system/tray/size_range_layout.cc
index 7404ed2da570dc230a4b98fb508d2ca4c9ca63f6..29cc471b612fc1b9c732da5dc23e4fd347496d8b 100644
--- a/ash/system/tray/size_range_layout.cc
+++ b/ash/system/tray/size_range_layout.cc
@@ -22,6 +22,9 @@ SizeRangeLayout::SizeRangeLayout()
     : SizeRangeLayout(gfx::Size(kAbsoluteMinSize, kAbsoluteMinSize),
                       gfx::Size(kAbsoluteMaxSize, kAbsoluteMaxSize)) {}
 
+SizeRangeLayout::SizeRangeLayout(const gfx::Size& size)
+    : SizeRangeLayout(size, size) {}
+
 SizeRangeLayout::SizeRangeLayout(const gfx::Size& min_size,
                                  const gfx::Size& max_size)
     : layout_manager_(new views::FillLayout()),