Add base:: to string16 in extensions/.

extensions/common/extension.h

Index: extensions/common/extension.h
diff --git a/extensions/common/extension.h b/extensions/common/extension.h
index 4da7a03625e7c02d4f2093254aaf007fb9e49afd..fb2cf4c429cea6e5a7793ede64a8b1ddd478d666 100644
--- a/extensions/common/extension.h
+++ b/extensions/common/extension.h
@@ -341,7 +341,7 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
                               const base::FilePath& path,
                               const std::string& explicit_id,
                               int creation_flags,
-                              string16* error);
+                              base::string16* error);
 
   Extension(const base::FilePath& path,
             scoped_ptr<extensions::Manifest> manifest);
@@ -353,28 +353,28 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
   // of the underlying DictionaryValue in its members. We should decide to
   // either wrap the DictionaryValue and go with that only, or we should parse
   // into strong types and discard the value. But doing both is bad.
-  bool InitFromValue(int flags, string16* error);
+  bool InitFromValue(int flags, base::string16* error);
 
   // The following are helpers for InitFromValue to load various features of the
   // extension from the manifest.
 
-  bool LoadRequiredFeatures(string16* error);
-  bool LoadName(string16* error);
-  bool LoadVersion(string16* error);
+  bool LoadRequiredFeatures(base::string16* error);
+  bool LoadName(base::string16* error);
+  bool LoadVersion(base::string16* error);
 
-  bool LoadAppFeatures(string16* error);
+  bool LoadAppFeatures(base::string16* error);
   bool LoadExtent(const char* key,
                   URLPatternSet* extent,
                   const char* list_error,
                   const char* value_error,
-                  string16* error);
+                  base::string16* error);
 
-  bool LoadSharedFeatures(string16* error);
-  bool LoadDescription(string16* error);
-  bool LoadManifestVersion(string16* error);
-  bool LoadShortName(string16* error);
+  bool LoadSharedFeatures(base::string16* error);
+  bool LoadDescription(base::string16* error);
+  bool LoadManifestVersion(base::string16* error);
+  bool LoadShortName(base::string16* error);
 
-  bool CheckMinimumChromeVersion(string16* error) const;
+  bool CheckMinimumChromeVersion(base::string16* error) const;
 
   // The extension's human-readable name. Name is used for display purpose. It
   // might be wrapped with unicode bidi control characters so that it is