cc: Use std::map instead of hash_map for TaskGraphRunner namespaces.

cc/resources/task_graph_runner.h

Index: cc/resources/task_graph_runner.h
diff --git a/cc/resources/task_graph_runner.h b/cc/resources/task_graph_runner.h
index 722335a9801455dbdbde2237f52b8adf32ce91d7..b270ed84a346d14db5a6498109b2ce1016189bd5 100644
--- a/cc/resources/task_graph_runner.h
+++ b/cc/resources/task_graph_runner.h
@@ -5,10 +5,10 @@
 #ifndef CC_RESOURCES_TASK_GRAPH_RUNNER_H_
 #define CC_RESOURCES_TASK_GRAPH_RUNNER_H_
 
+#include <map>
 #include <string>
 #include <vector>
 
-#include "base/containers/scoped_ptr_hash_map.h"
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/condition_variable.h"
 #include "base/threading/simple_thread.h"
@@ -160,7 +160,7 @@ class CC_EXPORT TaskGraphRunner : public base::DelegateSimpleThread::Delegate {
     size_t num_running_tasks;
   };
 
-  typedef base::ScopedPtrHashMap<int, TaskNamespace> TaskNamespaceMap;
+  typedef std::map<int, TaskNamespace> TaskNamespaceMap;
 
   static bool CompareTaskPriority(const PrioritizedTask& a,
                                   const PrioritizedTask& b) {