prune down content_dll change to just the CONTENT_EXPORTS

content/browser/trace_controller.h

 // Copyright (c) 2011 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.
 
 #ifndef CONTENT_BROWSER_TRACE_CONTROLLER_H_
 #define CONTENT_BROWSER_TRACE_CONTROLLER_H_
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/debug/trace_event.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/singleton.h"
 #include "base/task.h"
+#include "content/common/content_export.h"
 
 class TraceMessageFilter;
 
 // Objects interested in receiving trace data derive from TraceSubscriber.
 // See also: trace_message_filter.h
 // See also: child_trace_message_filter.h
 class TraceSubscriber {
  public:
   // Called once after TraceController::EndTracingAsync.
   virtual void OnEndTracingComplete() = 0;
   // Called 0 or more times between TraceController::BeginTracing and
   // OnEndTracingComplete.
   virtual void OnTraceDataCollected(const std::string& json_events) = 0;
   // Called once after TraceController::GetKnownCategoriesAsync.
   virtual void OnKnownCategoriesCollected(
       const std::set<std::string>& known_categories) {}
   virtual void OnTraceBufferPercentFullReply(float percent_full) {}
 };
 
 // TraceController is used on the browser processes to enable/disable
 // trace status and collect trace data. Only the browser UI thread is allowed
 // to interact with the TraceController object. All calls on the TraceSubscriber
 // happen on the UI thread.
-class TraceController {
+class CONTENT_EXPORT TraceController {
  public:
   static TraceController* GetInstance();
 
   // Get set of known categories. This can change as new code paths are reached.
   // If true is returned, subscriber->OnKnownCategoriesCollected will be called
   // when once the categories are retrieved from child processes.
   bool GetKnownCategoriesAsync(TraceSubscriber* subscriber);
 
   // Called by browser process to start tracing events on all processes.
   //
@@ skipping 102 matching lines @@
   std::vector<std::string> included_categories_;
   std::vector<std::string> excluded_categories_;
 
   DISALLOW_COPY_AND_ASSIGN(TraceController);
 };
 
 DISABLE_RUNNABLE_METHOD_REFCOUNT(TraceController);
 
 #endif  // CONTENT_BROWSER_TRACE_CONTROLLER_H_