Make URLRequestContext a MemoryDumpProvider (Abandoned)

net/filter/source_stream.h

Index: net/filter/source_stream.h
diff --git a/net/filter/source_stream.h b/net/filter/source_stream.h
index be30c141a432eb6dd0a8a9e0304b28f8af531f79..49a771e06419515f9430c94a8979f5de4c3365e5 100644
--- a/net/filter/source_stream.h
+++ b/net/filter/source_stream.h
@@ -14,6 +14,12 @@
 #include "net/base/net_errors.h"
 #include "net/base/net_export.h"
 
+namespace base {
+namespace trace_event {
+class MemoryAllocatorDump;
+}
+}
+
 namespace net {
 
 class IOBuffer;
@@ -54,6 +60,12 @@ class NET_EXPORT_PRIVATE SourceStream {
   // logging.
   virtual std::string Description() const = 0;
 
+  // Called by URLRequestJob to dump memory allocation stats. |dump| is the
+  // memory allocator dump of the URLRequestJob. Default implementation does
+  // nothing.
+  virtual void DumpMemoryStats(
+      base::trace_event::MemoryAllocatorDump* dump) const {}
+
   SourceType type() const { return type_; }
 
  private: