Add the reason in heap profiler dumps.

third_party/tcmalloc/chromium/src/deep-heap-profile.h

Index: third_party/tcmalloc/chromium/src/deep-heap-profile.h
diff --git a/third_party/tcmalloc/chromium/src/deep-heap-profile.h b/third_party/tcmalloc/chromium/src/deep-heap-profile.h
index 7cf95fdc30ebce4a2e6b04437712fea38d3b5b68..e9300d282ba45447e7467a08c884bd3295e9e553 100644
--- a/third_party/tcmalloc/chromium/src/deep-heap-profile.h
+++ b/third_party/tcmalloc/chromium/src/deep-heap-profile.h
@@ -83,7 +83,9 @@ class DeepHeapProfile {
   //
   // In addition, a list of buckets is dumped into a ".buckets" file in
   // descending order of allocated bytes.
-  int FillOrderedProfile(char raw_buffer[], int buffer_size);
+  int FillOrderedProfile(char raw_buffer[],

[Alexander Potapenko, 2013/05/27 08:54:44]

The style guide suggests to put the input parameters before the outputs. I think
it's reasonable to put |reason| first (better keep the output buffer size after
the buffer itself)

[Dai Mikurube (NOT FULLTIME), 2013/05/27 10:08:24]

Thanks, sounds reasonable.  Done.

+                         int buffer_size,
+                         const char* reason);
 
  private:
 #ifdef USE_DEEP_HEAP_PROFILE