Uses and returns the fractional width in text eliding

ash/system/user/tray_user.cc

Index: ash/system/user/tray_user.cc
diff --git a/ash/system/user/tray_user.cc b/ash/system/user/tray_user.cc
index c11890ab88042ca02a04f0dafb7edf4d1957256c..abc765ee5ec8226ad28e7e90753b4652a3d070e7 100644
--- a/ash/system/user/tray_user.cc
+++ b/ash/system/user/tray_user.cc
@@ -540,10 +540,10 @@ void PublicAccountUserDetails::CalculatePreferredSize(SystemTrayItem* owner,
   const gfx::Insets insets = GetInsets();
   views::TrayBubbleView* bubble_view =
       owner->system_tray()->GetSystemBubble()->bubble_view();
-  int min_width = std::max(
+  float min_width = std::max(
       link_size.width(),
       bubble_view->GetPreferredSize().width() - (used_width + insets.width()));
-  int max_width = std::min(
+  float max_width = std::min<float>(
       font.GetStringWidth(text_) + space_width + link_size.width(),
       bubble_view->GetMaximumSize().width() - (used_width + insets.width()));
   // Do a binary search for the minimum width that ensures no more than three
@@ -554,9 +554,9 @@ void PublicAccountUserDetails::CalculatePreferredSize(SystemTrayItem* owner,
   std::vector<base::string16> lines;
   while (min_width < max_width) {
     lines.clear();
-    const int width = (min_width + max_width) / 2;
+    const float width = (min_width + max_width) / 2;
     const bool too_narrow = gfx::ElideRectangleText(
-        text_, font, width, INT_MAX, gfx::TRUNCATE_LONG_WORDS, &lines) != 0;
+        text_, font, width, FLT_MAX, gfx::TRUNCATE_LONG_WORDS, &lines) != 0;
     int line_count = lines.size();
     if (!too_narrow && line_count == 3 &&
             width - font.GetStringWidth(lines.back()) <=
@@ -572,7 +572,7 @@ void PublicAccountUserDetails::CalculatePreferredSize(SystemTrayItem* owner,
   // Calculate the corresponding height and set the preferred size.
   lines.clear();
   gfx::ElideRectangleText(
-      text_, font, min_width, INT_MAX, gfx::TRUNCATE_LONG_WORDS, &lines);
+      text_, font, min_width, FLT_MAX, gfx::TRUNCATE_LONG_WORDS, &lines);
   int line_count = lines.size();
   if (min_width - font.GetStringWidth(lines.back()) <=
       space_width + link_size.width()) {
@@ -582,7 +582,7 @@ void PublicAccountUserDetails::CalculatePreferredSize(SystemTrayItem* owner,
   const int link_extra_height = std::max(
       link_size.height() - learn_more_->GetInsets().top() - line_height, 0);
   preferred_size_ = gfx::Size(
-      min_width + insets.width(),
+      std::ceil(min_width + insets.width()),
       line_count * line_height + link_extra_height + insets.height());
 
   bubble_view->SetWidth(preferred_size_.width() + used_width);