Change most uses of Pickle to base::Pickle

extensions/common/api/sockets/sockets_manifest_permission_unittest.cc

Index: extensions/common/api/sockets/sockets_manifest_permission_unittest.cc
diff --git a/extensions/common/api/sockets/sockets_manifest_permission_unittest.cc b/extensions/common/api/sockets/sockets_manifest_permission_unittest.cc
index 419ddd77aecfb8e5390573f966ceca568bfc7718..4b2dbcf6a34cdb5ce1a6cb6bcbec56a88da8c964 100644
--- a/extensions/common/api/sockets/sockets_manifest_permission_unittest.cc
+++ b/extensions/common/api/sockets/sockets_manifest_permission_unittest.cc
@@ -194,7 +194,7 @@ TEST(SocketsManifestPermissionTest, Empty) {
 
   IPC::Message m;
   ipc_perm->Write(&m);
-  PickleIterator iter(m);
+  base::PickleIterator iter(m);
   EXPECT_TRUE(ipc_perm2->Read(&m, &iter));
   AssertEmptyPermission(ipc_perm2.get());
 }
@@ -399,7 +399,7 @@ TEST(SocketsManifestPermissionTest, IPC) {
 
   IPC::Message m;
   ipc_perm->Write(&m);
-  PickleIterator iter(m);
+  base::PickleIterator iter(m);
   EXPECT_TRUE(ipc_perm2->Read(&m, &iter));
   EXPECT_TRUE(permission->Equal(ipc_perm2.get()));
 }