Make URLRequestContext a MemoryDumpProvider (Abandoned)

net/filter/mock_source_stream.h

Index: net/filter/mock_source_stream.h
diff --git a/net/filter/mock_source_stream.h b/net/filter/mock_source_stream.h
index 9c88bef7cb806a3e75147b16b1c5df257b2c0e01..5dcd9d94d57c215b95e0ac533260b67ef72c6129 100644
--- a/net/filter/mock_source_stream.h
+++ b/net/filter/mock_source_stream.h
@@ -14,6 +14,12 @@
 #include "net/base/net_errors.h"
 #include "net/filter/source_stream.h"
 
+namespace base {
+namespace trace_event {
+class MemoryAllocatorDump;
+}
+}
+
 namespace net {
 
 class IOBuffer;
@@ -36,6 +42,8 @@ class MockSourceStream : public SourceStream {
            const CompletionCallback& callback) override;
   std::string Description() const override;
 
+  void DumpMemoryStats(
+      base::trace_event::MemoryAllocatorDump* dump) const override;
   // Enqueues a result to be returned by |Read|. This method does not make a
   // copy of |data|, so |data| must outlive this object. If |mode| is SYNC,
   // |Read| will return the supplied data synchronously; otherwise, consumer