Enable hidpi on Linux, refactor a bit on Windows to share

content/public/common/content_switches.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/public/common/content_switches.h"
 
 #include "base/command_line.h"
 
 namespace switches {
 
@@ skipping 51 matching lines @@
 // Path to the exe to run for the renderer and plugin subprocesses.
 const char kBrowserSubprocessPath[]         = "browser-subprocess-path";
 
 // Dumps extra logging about plugin loading to the log file.
 const char kDebugPluginLoading[] = "debug-plugin-loading";
 
 // Sets the tile size used by composited layers.
 const char kDefaultTileWidth[]              = "default-tile-width";
 const char kDefaultTileHeight[]             = "default-tile-height";
 
+// Device scale factor passed to certain processes like renderers, etc.
+const char kDeviceScaleFactor[]     = "device-scale-factor";
+
 // Disable antialiasing on 2d canvas.
 const char kDisable2dCanvasAntialiasing[]   = "disable-canvas-aa";
 
 // Disables client-visible 3D APIs, in particular WebGL and Pepper 3D.
 // This is controlled by policy and is kept separate from the other
 // enable/disable switches to avoid accidentally regressing the policy
 // support for controlling access to these APIs.
 const char kDisable3DAPIs[]                 = "disable-3d-apis";
 
 // Disable gpu-accelerated 2d canvas.
@@ skipping 865 matching lines @@
 const char kDisableCoreAnimationPlugins[] =
     "disable-core-animation-plugins";
 
 // Allows input events to be handed on the compositor thread.
 // This feature is under development, see http://crbug.com/138003.
 extern const char kEnableThreadedEventHandlingMac[] =
     "enable-threaded-event-handling-mac";
 #endif
 
 #if defined(OS_WIN)
-// Device scale factor passed to certain processes like renderers, etc.
-const char kDeviceScaleFactor[]     = "device-scale-factor";
-
 // Disable the Legacy Window which corresponds to the size of the WebContents.
 const char kDisableLegacyIntermediateWindow[] = "disable-legacy-window";
 
 // Enable the Win32K process mitigation policy for renderer processes which
 // prevents them from invoking user32 and gdi32 system calls which enter
 // the kernel. This is only supported on Windows 8 and beyond.
 const char kEnableWin32kRendererLockDown[]
     = "enable_win32k_renderer_lockdown";
 #endif
 
 #if defined(ENABLE_PLUGINS)
 // Enables the plugin power saver feature.
 const char kEnablePluginPowerSaver[] = "enable-plugin-power-saver";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches