Do not wrap APIs in Thread namespace. (#1183)

src/core/crypto/openthread-crypto.cpp

@@ -38,8 +38,7 @@
 #include <crypto/hmac_sha256.hpp>
 #include <crypto/aes_ccm.hpp>
 
-namespace Thread {
-namespace Crypto {
+using namespace Thread::Crypto;
 
 #ifdef __cplusplus
 extern "C" {
@@ -93,6 +92,3 @@ exit:
 #ifdef __cplusplus
 }  // extern "C"
 #endif
-
-}  // namespace Crypto
-}  // namespace Thread

src/core/openthread.cpp

@@ -67,6 +67,8 @@
 #include <coap/coap_client.hpp>
 #include <coap/coap_server.hpp>
 
+using namespace Thread;
+
 #ifndef OPENTHREAD_MULTIPLE_INSTANCE
 static otDEFINE_ALIGNED_VAR(sInstanceRaw, sizeof(otInstance), uint64_t);
 otInstance *sInstance = NULL;
@@ -86,8 +88,6 @@ otInstance::otInstance(void) :
 {
 }
 
-namespace Thread {
-
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -1890,5 +1890,3 @@ ThreadError otCoapSendResponse(otInstance *aInstance, otMessage aMessage, const
 #ifdef __cplusplus
 }  // extern "C"
 #endif
-
-}  // namespace Thread

src/diag/openthread-diag.cpp

@@ -38,9 +38,7 @@
 #include <openthread-diag.h>
 #include <diag_process.hpp>
 
-namespace Thread {
-
-namespace Diagnostics {
+using namespace Thread::Diagnostics;
 
 #ifdef __cplusplus
 extern "C" {
@@ -89,6 +87,3 @@ bool isDiagEnabled()
 #ifdef __cplusplus
 }  // extern "C"
 #endif
-
-}  // namespace Diagnostics
-}  // namespace Thread