[cast_channel] Move cast_channel related files from //extensions to //components

extensions/browser/api/cast_channel/cast_channel_api.cc

Index: extensions/browser/api/cast_channel/cast_channel_api.cc
diff --git a/extensions/browser/api/cast_channel/cast_channel_api.cc b/extensions/browser/api/cast_channel/cast_channel_api.cc
index b645aed0b39b543552800d0eff72b56a75aa7125..24bc55159f4e3f4073317cd413d6e7411cd81354 100644
--- a/extensions/browser/api/cast_channel/cast_channel_api.cc
+++ b/extensions/browser/api/cast_channel/cast_channel_api.cc
@@ -18,14 +18,15 @@
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/values.h"
+#include "components/cast_channel/cast_message_util.h"
+#include "components/cast_channel/cast_socket.h"
+#include "components/cast_channel/cast_socket_service.h"
+#include "components/cast_channel/cast_socket_service_factory.h"
+#include "components/cast_channel/keep_alive_delegate.h"
+#include "components/cast_channel/logger.h"
 #include "content/public/browser/browser_thread.h"
 #include "extensions/browser/api/cast_channel/cast_channel_enum_util.h"
 #include "extensions/browser/api/cast_channel/cast_message_util.h"
-#include "extensions/browser/api/cast_channel/cast_socket.h"
-#include "extensions/browser/api/cast_channel/cast_socket_service.h"
-#include "extensions/browser/api/cast_channel/cast_socket_service_factory.h"
-#include "extensions/browser/api/cast_channel/keep_alive_delegate.h"
-#include "extensions/browser/api/cast_channel/logger.h"
 #include "extensions/browser/event_router.h"
 #include "extensions/common/api/cast_channel/cast_channel.pb.h"
 #include "extensions/common/api/cast_channel/logging.pb.h"
@@ -39,23 +40,24 @@ const int kDefaultConnectTimeoutMillis = 5000;  // 5 seconds.
 
 namespace extensions {
 
+namespace cast_channel = api::cast_channel;

[mark a. foltz, 2017/06/01 21:26:35]

I think this ends up being very similar to ::cast_channel and potentially
confusing.  Can it be removed?  I don't see any uses in the code below apart
from the namespace statements.

[zhaobin, 2017/06/01 22:00:38]

Done.

 namespace Close = cast_channel::Close;
 namespace OnError = cast_channel::OnError;
 namespace OnMessage = cast_channel::OnMessage;
 namespace Open = cast_channel::Open;
 namespace Send = cast_channel::Send;
 using ::cast_channel::ChannelError;
-using cast_channel::CastDeviceCapability;
-using cast_channel::CastMessage;
-using cast_channel::CastSocket;
-using cast_channel::CastSocketImpl;
-using cast_channel::CastTransport;
+using ::cast_channel::CastDeviceCapability;
+using ::cast_channel::CastMessage;
+using ::cast_channel::CastSocket;
+using ::cast_channel::CastSocketImpl;
+using ::cast_channel::CastTransport;
+using ::cast_channel::KeepAliveDelegate;
+using ::cast_channel::LastErrors;
+using ::cast_channel::Logger;
 using cast_channel::ChannelInfo;
 using cast_channel::ConnectInfo;
 using cast_channel::ErrorInfo;
-using cast_channel::KeepAliveDelegate;
-using cast_channel::LastErrors;
-using cast_channel::Logger;
 using cast_channel::MessageInfo;
 using content::BrowserThread;
 
@@ -91,10 +93,10 @@ void FillErrorInfo(cast_channel::ChannelError error_state,
                    const LastErrors& last_errors,
                    ErrorInfo* error_info) {
   error_info->error_state = error_state;
-  if (last_errors.event_type != cast_channel::proto::EVENT_TYPE_UNKNOWN)
+  if (last_errors.event_type != ::cast_channel::proto::EVENT_TYPE_UNKNOWN)
     error_info->event_type.reset(new int(last_errors.event_type));
   if (last_errors.challenge_reply_error_type !=
-      cast_channel::proto::CHALLENGE_REPLY_ERROR_NONE) {
+      ::cast_channel::proto::CHALLENGE_REPLY_ERROR_NONE) {
     error_info->challenge_reply_error_type.reset(
         new int(last_errors.challenge_reply_error_type));
   }
@@ -177,9 +179,8 @@ CastChannelAsyncApiFunction::CastChannelAsyncApiFunction()
 CastChannelAsyncApiFunction::~CastChannelAsyncApiFunction() { }
 
 bool CastChannelAsyncApiFunction::PrePrepare() {
-  cast_socket_service_ =
-      api::cast_channel::CastSocketServiceFactory::GetInstance()
-          ->GetForBrowserContext(browser_context());
+  cast_socket_service_ = ::cast_channel::CastSocketServiceFactory::GetInstance()
+                             ->GetForBrowserContext(browser_context());
   DCHECK(cast_socket_service_);
   return true;
 }