Uses and returns the fractional width in text eliding

ui/views/corewm/tooltip_controller_unittest.cc

 // Copyright (c) 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.
 
 #include "ui/views/corewm/tooltip_controller.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "ui/aura/client/cursor_client.h"
 #include "ui/aura/client/tooltip_client.h"
 #include "ui/aura/client/window_types.h"
@@ skipping 196 matching lines @@
   EXPECT_FALSE(helper_->IsTooltipVisible());
 
   // Enable tooltips back and check again.
   helper_->controller()->SetTooltipsEnabled(true);
   EXPECT_FALSE(helper_->IsTooltipVisible());
   helper_->FireTooltipTimer();
   EXPECT_TRUE(helper_->IsTooltipVisible());
 }
 
 TEST_F(TooltipControllerTest, TrimTooltipToFitTests) {
-  const int max_width = 4000;
+  const float max_width = 4000;
   string16 tooltip;
-  int width, line_count, expect_lines;
+  float width;
+  int line_count, expect_lines;
   int max_pixel_width = 400;  // copied from constants in tooltip_controller.cc
   int max_lines = 10;  // copied from constants in tooltip_controller.cc
   gfx::Font font = GetDefaultFont();
   size_t tooltip_len;
 
   // Error in computed size vs. expected size should not be greater than the
   // size of the longest word.
   int error_in_pixel_width = font.GetStringWidth(ASCIIToUTF16("tooltip"));
 
   // Long tooltips should wrap to next line
@@ skipping 58 matching lines @@
   EXPECT_EQ(font.GetStringWidth(ASCIIToUTF16("Small Tooltip")), width);
   EXPECT_EQ(1, line_count);
   EXPECT_EQ(ASCIIToUTF16("Small Tooltip"), tooltip);
 
   // Normal small multi-line tooltip should stay as is.
   tooltip.clear();
   width = line_count = -1;
   tooltip = ASCIIToUTF16("Multi line\nTooltip");
   TooltipControllerTestHelper::TrimTooltipToFit(
       max_width, &tooltip, &width, &line_count);
-  int expected_width = font.GetStringWidth(ASCIIToUTF16("Multi line"));
+  float expected_width = font.GetStringWidth(ASCIIToUTF16("Multi line"));
   expected_width = std::max(expected_width,
                             font.GetStringWidth(ASCIIToUTF16("Tooltip")));
   EXPECT_EQ(expected_width, width);
   EXPECT_EQ(2, line_count);
   EXPECT_EQ(ASCIIToUTF16("Multi line\nTooltip"), tooltip);
 
   // Whitespaces in tooltips are preserved.
   tooltip.clear();
   width = line_count = -1;
   tooltip = ASCIIToUTF16("Small  Tool  t\tip");
@@ skipping 229 matching lines @@
   EXPECT_EQ(
       widget_->GetNativeWindow()->GetRootWindow()->children().back()->type(),
       aura::client::WINDOW_TYPE_TOOLTIP);
 }
 
 #endif
 
 }  // namespace test
 }  // namespace corewm
 }  // namespace views