Ensure that the extension icons show up in the omnibox at fractional scales.

ui/base/layout.cc

 // 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.
 
 #include "ui/base/layout.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 
@@ skipping 74 matching lines @@
   return gfx::GetDPIScale();
 #else
   return GetScaleForScaleFactor(scale_factor);
 #endif
 }
 
 float GetScaleForScaleFactor(ScaleFactor scale_factor) {
   return kScaleFactorScales[scale_factor];
 }
 
+bool IsSupportedScale(float scale) {
+  const std::vector<float>& supported_scales =
+      gfx::ImageSkia::GetSupportedScales();

[sky, 2015/03/25 14:49:10]

Why are you using ImageSkia and not g_supported_scale_factors?

[ananta, 2015/03/25 16:56:05]

Done.

+  return std::find(supported_scales.begin(), supported_scales.end(), scale)
+      != supported_scales.end();
+}
+
 namespace test {
 
 ScopedSetSupportedScaleFactors::ScopedSetSupportedScaleFactors(
     const std::vector<ui::ScaleFactor>& new_scale_factors) {
   if (g_supported_scale_factors) {
     original_scale_factors_ =
         new std::vector<ScaleFactor>(*g_supported_scale_factors);
   } else {
     original_scale_factors_ = NULL;
   }
@@ skipping 14 matching lines @@
 
 #if !defined(OS_MACOSX)
 float GetScaleFactorForNativeView(gfx::NativeView view) {
   gfx::Screen* screen = gfx::Screen::GetScreenFor(view);
   gfx::Display display = screen->GetDisplayNearestWindow(view);
   return display.device_scale_factor();
 }
 #endif  // !defined(OS_MACOSX)
 
 }  // namespace ui