Make File::Duplicate() const

content/browser/tracing/file_tracing_provider_impl.h

Index: content/browser/tracing/file_tracing_provider_impl.h
diff --git a/content/browser/tracing/file_tracing_provider_impl.h b/content/browser/tracing/file_tracing_provider_impl.h
index 8926635adaedb71443b69fe02f6f24bb912fbc12..398ec544f03d78ac2b4b4a5104c8d71d8b9f3ae5 100644
--- a/content/browser/tracing/file_tracing_provider_impl.h
+++ b/content/browser/tracing/file_tracing_provider_impl.h
@@ -21,11 +21,13 @@ class FileTracingProviderImpl : public base::FileTracing::Provider {
 
   // base::FileTracing::Provider:
   bool FileTracingCategoryIsEnabled() const override;
-  void FileTracingEnable(void* id) override;
-  void FileTracingDisable(void* id) override;
-  void FileTracingEventBegin(const char* name, void* id,
-                             const base::FilePath& path, int64_t size) override;
-  void FileTracingEventEnd(const char* name, void* id) override;
+  void FileTracingEnable(const void* id) override;
+  void FileTracingDisable(const void* id) override;
+  void FileTracingEventBegin(const char* name,
+                             const void* id,
+                             const base::FilePath& path,
+                             int64_t size) override;
+  void FileTracingEventEnd(const char* name, const void* id) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FileTracingProviderImpl);