Generate all extension schema namespaces as "api" and instead vary the generated bundle names.

extensions/browser/api/cast_channel/cast_channel_api_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/browser/api/cast_channel/cast_channel_api.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "net/base/ip_endpoint.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace extensions {
-namespace core_api {
+namespace api {
 namespace cast_channel {
 
 // Tests parsing of ConnectInfo.
 TEST(CastChannelOpenFunctionTest, TestParseConnectInfo) {
   typedef CastChannelOpenFunction ccof;
   scoped_ptr<net::IPEndPoint> ip_endpoint;
 
   // Valid ConnectInfo
   ConnectInfo connect_info;
   connect_info.ip_address = "192.0.0.1";
   connect_info.port = 8009;
   connect_info.auth = CHANNEL_AUTH_TYPE_SSL;
 
   ip_endpoint.reset(ccof::ParseConnectInfo(connect_info));
   EXPECT_TRUE(ip_endpoint);
   EXPECT_EQ(ip_endpoint->ToString(), "192.0.0.1:8009");
 }
 
 }  // namespace cast_channel
-}  // namespace core_api
+}  // namespace api
 }  // namespace extensions