Re-introduce the partial magnifier

ash/magnifier/magnifier_constants.h

Index: ash/magnifier/magnifier_constants.h
diff --git a/ash/magnifier/magnifier_constants.h b/ash/magnifier/magnifier_constants.h
index 4ca4c892e97b3b01cd6f9e7039fa1e1906547a23..f13f6b14fe914e880de72aa418206e033bdd82c4 100644
--- a/ash/magnifier/magnifier_constants.h
+++ b/ash/magnifier/magnifier_constants.h
@@ -8,11 +8,12 @@
 namespace ash {
 
 enum MagnifierType {
-  MAGNIFIER_OFF,
-  MAGNIFIER_FULL,
-  MAGNIFIER_PARTIAL,
+  MAGNIFIER_FULL           = 1,  // This should not be changed for UMA and pref.

[Daniel Erat, 2013/01/08 00:28:49]

nit: get rid of extra spaces before '=' characters

also, just move the comment to the top:

  // Note: Do not change these values; UMA and prefs depend on them.
  enum MagnifierType {

[yoshiki, 2013/01/09 03:03:15]

Done.

+  MAGNIFIER_PARTIAL        = 2,  // This should not be changed for UMA and pref.
 };
 
+const MagnifierType DEFAULT_MAGNIFIER_TYPE = MAGNIFIER_FULL;

[Daniel Erat, 2013/01/08 00:28:49]

nit: use kDefaultMagnifierType instead

[yoshiki, 2013/01/09 03:03:15]

Done.

+
 }  // namespace ash
 
 #endif  // ASH_MAGNIFIER_MAGNIFIER_CONSTANTS_H_