Define DevTools content API

content/browser/debugger/worker_devtools_manager.h

Index: content/browser/debugger/worker_devtools_manager.h
diff --git a/content/browser/debugger/worker_devtools_manager.h b/content/browser/debugger/worker_devtools_manager.h
index 228653ef679d44a00b8f3a24edc290efe647e858..fb027ecf12ac1c780c2220307b8ee38321036340 100644
--- a/content/browser/debugger/worker_devtools_manager.h
+++ b/content/browser/debugger/worker_devtools_manager.h
@@ -15,12 +15,14 @@
 #include "content/common/content_export.h"
 #include "content/browser/worker_host/worker_service_observer.h"
 
-class DevToolsAgentHost;
-
 namespace IPC {
 class Message;
 }
 
+namespace content {
+
+class DevToolsAgentHost;
+
 // All methods are supposed to be called on the IO thread.
 class WorkerDevToolsManager : private WorkerServiceObserver {
  public:
@@ -28,7 +30,7 @@ class WorkerDevToolsManager : private WorkerServiceObserver {
   static WorkerDevToolsManager* GetInstance();
 
   // Called on the UI thread.
-  CONTENT_EXPORT static DevToolsAgentHost* GetDevToolsAgentHostForWorker(
+  static DevToolsAgentHost* GetDevToolsAgentHostForWorker(
       int worker_process_id,
       int worker_route_id);
 
@@ -110,4 +112,6 @@ class WorkerDevToolsManager : private WorkerServiceObserver {
   DISALLOW_COPY_AND_ASSIGN(WorkerDevToolsManager);
 };
 
+}  // namespace content
+
 #endif  // CONTENT_BROWSER_DEBUGGER_WORKER_DEVTOOLS_MANAGER_H_