linux: No longer needs to manually read DPI settings

It is now done in brightray by reading the value from GTK+.

atom/browser/atom_browser_main_parts.cc

@@ -55,10 +55,6 @@ void AtomBrowserMainParts::RegisterDestructionCallback(
 void AtomBrowserMainParts::PostEarlyInitialization() {
   brightray::BrowserMainParts::PostEarlyInitialization();
 
-#if defined(USE_X11)
-  SetDPIFromGSettings();
-#endif
-
   {
     // Temporary set the bridge_task_runner_ as current thread's task runner,
     // so we can fool gin::PerIsolateData to use it as its task runner, instead

atom/browser/atom_browser_main_parts.h

@@ -48,10 +48,6 @@ class AtomBrowserMainParts : public brightray::BrowserMainParts {
 #endif
 
  private:
-#if defined(USE_X11)
-  void SetDPIFromGSettings();
-#endif
-
   // A fake BrowserProcess object that used to feed the source code from chrome.
   scoped_ptr<BrowserProcess> fake_browser_process_;
 

atom/browser/atom_browser_main_parts_linux.cc

@@ -1,73 +0,0 @@
-// Copyright (c) 2014 GitHub, Inc.
-// Use of this source code is governed by the MIT license that can be
-// found in the LICENSE file.
-
-#include "atom/browser/atom_browser_main_parts.h"
-
-#include <gio/gio.h>
-
-#include "base/command_line.h"
-#include "base/strings/string_number_conversions.h"
-#include "ui/gfx/switches.h"
-
-namespace atom {
-
-namespace {
-
-const char* kInterfaceSchema = "org.gnome.desktop.interface";
-const char* kScaleFactor = "scaling-factor";
-
-bool SchemaExists(const char* schema_name) {
-  const gchar* const* schemas = g_settings_list_schemas();
-  while (*schemas) {
-    if (strcmp(schema_name, static_cast<const char*>(*schemas)) == 0)
-      return true;
-    schemas++;
-  }
-  return false;
-}
-
-bool KeyExists(GSettings* client, const char* key) {
-  gchar** keys = g_settings_list_keys(client);
-  if (!keys)
-    return false;
-
-  gchar** iter = keys;
-  while (*iter) {
-    if (strcmp(*iter, key) == 0)
-      break;
-    iter++;
-  }
-
-  bool exists = *iter != NULL;
-  g_strfreev(keys);
-  return exists;
-}
-
-void GetDPIFromGSettings(guint* scale_factor) {
-  GSettings* client = nullptr;
-  if (!SchemaExists(kInterfaceSchema) ||
-      !(client = g_settings_new(kInterfaceSchema))) {
-    VLOG(1) << "Cannot create gsettings client.";
-    return;
-  }
-
-  if (KeyExists(client, kScaleFactor))
-    *scale_factor = g_settings_get_uint(client, kScaleFactor);
-
-  g_object_unref(client);
-}
-
-}  // namespace
-
-void AtomBrowserMainParts::SetDPIFromGSettings() {
-  guint scale_factor = 1;
-  GetDPIFromGSettings(&scale_factor);
-  if (scale_factor == 0)
-    scale_factor = 1;
-
-  base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
-      switches::kForceDeviceScaleFactor, base::UintToString(scale_factor));
-}
-
-}  // namespace atom

filenames.gypi

@@ -124,7 +124,6 @@
       'atom/browser/atom_download_manager_delegate.h',
       'atom/browser/atom_browser_main_parts.cc',
       'atom/browser/atom_browser_main_parts.h',
-      'atom/browser/atom_browser_main_parts_linux.cc',
       'atom/browser/atom_browser_main_parts_mac.mm',
       'atom/browser/atom_javascript_dialog_manager.cc',
       'atom/browser/atom_javascript_dialog_manager.h',

vendor/brightray

@@ -1 +1 @@
-Subproject commit 361d99dd05a8368faee20bc39a6ffaedbc67c383
+Subproject commit bbb9287337f8b7958b001be35b993c21cd573109