[NOT FOR LANDING] Detailed loading traces

content/browser/loader/resource_buffer.cc

Index: content/browser/loader/resource_buffer.cc
diff --git a/content/browser/loader/resource_buffer.cc b/content/browser/loader/resource_buffer.cc
index 3f5a5c89b974c3c239532b843f5e0097d1a936b8..f573d633c68ac7b0fc59a4c60f53a97154a3c989 100644
--- a/content/browser/loader/resource_buffer.cc
+++ b/content/browser/loader/resource_buffer.cc
@@ -7,6 +7,7 @@
 #include <math.h>
 
 #include "base/logging.h"
+#include "base/trace_event/trace_event.h"
 
 namespace content {
 
@@ -44,6 +45,8 @@ ResourceBuffer::~ResourceBuffer() {
 bool ResourceBuffer::Initialize(int buffer_size,
                                 int min_allocation_size,
                                 int max_allocation_size) {
+  TRACE_EVENT0("toplevel", "ResourceBuffer::Initialize(");
+
   CHECK(!IsInitialized());
 
   // It would be wasteful if these are not multiples of min_allocation_size.
@@ -80,6 +83,7 @@ bool ResourceBuffer::CanAllocate() const {
 }
 
 char* ResourceBuffer::Allocate(int* size) {
+  TRACE_EVENT0("toplevel", "ResourceBuffer::Allocate");
   CHECK(CanAllocate());
 
   int alloc_offset = 0;