ChromeOS Mouse settings.

chrome/browser/chromeos/preferences.cc

Index: chrome/browser/chromeos/preferences.cc
===================================================================
--- chrome/browser/chromeos/preferences.cc	(revision 114069)
+++ chrome/browser/chromeos/preferences.cc	(working copy)
@@ -44,6 +44,9 @@
   prefs->RegisterBooleanPref(prefs::kTapToClickEnabled,
                              false,
                              PrefService::SYNCABLE_PREF);
+  prefs->RegisterBooleanPref(prefs::kPrimaryMouseButtonLeft,
+                             true,
+                             PrefService::SYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kLabsMediaplayerEnabled,
                              false,
                              PrefService::UNSYNCABLE_PREF);
@@ -208,6 +211,7 @@
   accessibility_enabled_.Init(prefs::kSpokenFeedbackEnabled, prefs, this);
   sensitivity_.Init(prefs::kTouchpadSensitivity, prefs, this);
   use_24hour_clock_.Init(prefs::kUse24HourClock, prefs, this);
+  primary_mouse_button_left_.Init(prefs::kPrimaryMouseButtonLeft, prefs, this);
   language_hotkey_next_engine_in_menu_.Init(
       prefs::kLanguageHotkeyNextEngineInMenu, prefs, this);
   language_hotkey_previous_engine_.Init(
@@ -309,6 +313,14 @@
           "Touchpad.Sensitivity.Started", sensitivity, 1, 5, 5);
     }
   }
+  if (!pref_name || *pref_name == prefs::kPrimaryMouseButtonLeft) {
+    const bool left = primary_mouse_button_left_.GetValue();
+    system::mouse_settings::SetPrimaryButtonLeft(left);
+    if (pref_name)
+      UMA_HISTOGRAM_BOOLEAN("Mouse.PrimaryButtonLeft.Changed", left);
+    else
+      UMA_HISTOGRAM_BOOLEAN("Mouse.PrimaryButtonLeft.Started", left);
+  }
 
   // We don't handle prefs::kLanguageCurrentInputMethod and PreviousInputMethod
   // here.