Switch to standard integer types in components/, part 3 of 4.

components/pref_registry/pref_registry_syncable.h

Index: components/pref_registry/pref_registry_syncable.h
diff --git a/components/pref_registry/pref_registry_syncable.h b/components/pref_registry/pref_registry_syncable.h
index 3a0b1d681bb4abbf4b05b4e9e6f982b23b72a101..88c3b01964b99bf01f35d45464b1311469a3fb1b 100644
--- a/components/pref_registry/pref_registry_syncable.h
+++ b/components/pref_registry/pref_registry_syncable.h
@@ -5,9 +5,12 @@
 #ifndef COMPONENTS_PREF_REGISTRY_PREF_REGISTRY_SYNCABLE_H_
 #define COMPONENTS_PREF_REGISTRY_PREF_REGISTRY_SYNCABLE_H_
 
+#include <stdint.h>
+
 #include <string>
 
 #include "base/callback.h"
+#include "base/macros.h"
 #include "base/prefs/pref_registry_simple.h"
 
 namespace base {
@@ -42,7 +45,7 @@ class PrefRegistrySyncable : public PrefRegistrySimple {
   // should ever be specified.
   //
   // Note: These must NOT overlap with PrefRegistry::PrefRegistrationFlags.
-  enum PrefRegistrationFlags : uint32 {
+  enum PrefRegistrationFlags : uint32_t {
     // The pref will be synced.
     SYNCABLE_PREF = 1 << 0,
 
@@ -53,7 +56,7 @@ class PrefRegistrySyncable : public PrefRegistrySimple {
     SYNCABLE_PRIORITY_PREF = 1 << 1,
   };
 
-  typedef base::Callback<void(const std::string& path, uint32 flags)>
+  typedef base::Callback<void(const std::string& path, uint32_t flags)>
       SyncableRegistrationCallback;
 
   PrefRegistrySyncable();
@@ -77,7 +80,7 @@ class PrefRegistrySyncable : public PrefRegistrySimple {
   // PrefRegistrySimple overrides.
   void OnPrefRegistered(const std::string& path,
                         base::Value* default_value,
-                        uint32 flags) override;
+                        uint32_t flags) override;
 
   SyncableRegistrationCallback callback_;