Update some uses of Value in chrome/browser to use the base:: namespace.

chrome/browser/extensions/image_loader_unittest.cc

Index: chrome/browser/extensions/image_loader_unittest.cc
diff --git a/chrome/browser/extensions/image_loader_unittest.cc b/chrome/browser/extensions/image_loader_unittest.cc
index 9b444b13160d2214332d6b879b9bc803eadc7f6f..620448fbec2552f0ab837932c232f826e2766df8 100644
--- a/chrome/browser/extensions/image_loader_unittest.cc
+++ b/chrome/browser/extensions/image_loader_unittest.cc
@@ -73,9 +73,9 @@ class ImageLoaderTest : public testing::Test {
     int error_code = 0;
     std::string error;
     JSONFileValueSerializer serializer(test_file.AppendASCII("app.json"));
-    scoped_ptr<DictionaryValue> valid_value(
-        static_cast<DictionaryValue*>(serializer.Deserialize(&error_code,
-                                                             &error)));
+    scoped_ptr<base::DictionaryValue> valid_value(
+        static_cast<base::DictionaryValue*>(serializer.Deserialize(&error_code,
+                                                                   &error)));
     EXPECT_EQ(0, error_code) << error;
     if (error_code != 0)
       return NULL;