add enums to distinguish different constructors for matrix44

include/utils/SkMatrix44.h

Index: include/utils/SkMatrix44.h 
=================================================================== 
--- include/utils/SkMatrix44.h	(revision 6672) 
+++ include/utils/SkMatrix44.h	(working copy) 
@@ -103,6 +103,24 @@ 
 
 class SK_API SkMatrix44 { 
 public: 
+ enum Uninitialized_Constructor { 
+ kUnitialized_Constructor 
+ }; 
+ enum Identity_Constructor { 
+ kIdentity_Constructor 
+ }; 
+ enum Scale_Constructor { 
+ kScale_Constructor 
+ }; 
+ enum Translate_Constructor { 
+ kTranslate_Constructor 
+ }; 
+ 
+ SkMatrix44(Uninitialized_Constructor); 
+ SkMatrix44(Identity_Constructor); 
+ SkMatrix44(Scale_Constructor, SkMScalar sx, SkMScalar sy, SkMScalar sz); 
+ SkMatrix44(Translate_Constructor, SkMScalar tx, SkMScalar ty, SkMScalar tz); 
+ 
 SkMatrix44() { this->setIdentity(); } 
 SkMatrix44(const SkMatrix44&); 
 SkMatrix44(const SkMatrix44& a, const SkMatrix44& b);