Instrument SourceStream using MemoryDumpProvider

net/filter/sdch_source_stream.cc

Index: net/filter/sdch_source_stream.cc
diff --git a/net/filter/sdch_source_stream.cc b/net/filter/sdch_source_stream.cc
index c54620e961f6d8162b34f441be8a0e1f0c37e01f..d67773c23bb6f3f9071a0b7f769823a2b74f0702 100644
--- a/net/filter/sdch_source_stream.cc
+++ b/net/filter/sdch_source_stream.cc
@@ -8,6 +8,9 @@
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/numerics/safe_conversions.h"
+#include "base/strings/stringprintf.h"
+#include "base/trace_event/memory_allocator_dump.h"
+#include "base/trace_event/process_memory_dump.h"
 #include "base/values.h"
 #include "net/base/io_buffer.h"
 #include "net/log/net_log_capture_mode.h"
@@ -54,6 +57,19 @@ std::string SdchSourceStream::GetTypeAsString() const {
   return kSdchPossible;
 }
 
+void SdchSourceStream::DumpMemoryStatsImpl(
+    base::trace_event::ProcessMemoryDump* pmd,
+    const std::string& parent_dump_absolute_name) const {
+  // Log pointer address to avoid duplication though in practice there is
+  // often only one SdchSourceStream per URLRequest.
+  base::trace_event::MemoryAllocatorDump* sdch_dump =
+      pmd->CreateAllocatorDump(base::StringPrintf(
+          "%s/sdch_%p", parent_dump_absolute_name.c_str(), this));
+  sdch_dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
+                       base::trace_event::MemoryAllocatorDump::kUnitsBytes,
+                       buffered_output_.size());
+}
+
 int SdchSourceStream::FilterData(IOBuffer* output_buffer,
                                  int output_buffer_size,
                                  IOBuffer* input_buffer,