Make the LCD text device scale factor threshold 1.5 inclusive

content/renderer/render_view_impl.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 "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 343 matching lines @@
   }
 }
 
 // Returns true if the device scale is high enough that losing subpixel
 // antialiasing won't have a noticeable effect on text quality.
 static bool DeviceScaleEnsuresTextQuality(float device_scale_factor) {
 #if defined(OS_ANDROID)
   // On Android, we never have subpixel antialiasing.
   return true;
 #else
-  return device_scale_factor > 1.5f;
+  // 1.5 is a common touchscreen tablet device scale factor. For such
+  // devices main thread antialiasing is a heavy burden.
+  return device_scale_factor >= 1.5f;
 #endif
 
 }
 
 static bool PreferCompositingToLCDText(CompositorDependencies* compositor_deps,
                                        float device_scale_factor) {
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
   if (command_line.HasSwitch(switches::kDisablePreferCompositingToLCDText))
     return false;
@@ skipping 3457 matching lines @@
     std::vector<gfx::Size> sizes;
     ConvertToFaviconSizes(icon_urls[i].sizes(), &sizes);
     if (!url.isEmpty())
       urls.push_back(
           FaviconURL(url, ToFaviconType(icon_urls[i].iconType()), sizes));
   }
   SendUpdateFaviconURL(urls);
 }
 
 }  // namespace content