[tracing] Adding task information to heap profiler

base/trace_event/heap_profiler_allocation_context_tracker.h

Index: base/trace_event/heap_profiler_allocation_context_tracker.h
diff --git a/base/trace_event/heap_profiler_allocation_context_tracker.h b/base/trace_event/heap_profiler_allocation_context_tracker.h
index 1d609f6d2e3188a0f136656548b7c4f0d22aaa08..c100dba78d30741b6de6dda83d1d173db8cafa5e 100644
--- a/base/trace_event/heap_profiler_allocation_context_tracker.h
+++ b/base/trace_event/heap_profiler_allocation_context_tracker.h
@@ -61,6 +61,13 @@ class BASE_EXPORT AllocationContextTracker {
   // Pops a frame from the thread-local pseudo stack.
   static void PopPseudoStackFrame(StackFrame frame);
 
+  // Pushes the thread name as the first entry in the pseudo stack.
+  static void SetThreadName(const char* name);
+
+  // Sets the file name where the current task on thread is posted from. This is
+  // used to categorize theallocations by source path.
+  static void SetCurrentTaskFileName(const char* file_name);
+
   // Returns a snapshot of the current thread-local context.
   static AllocationContext GetContextSnapshot();
 
@@ -76,6 +83,9 @@ class BASE_EXPORT AllocationContextTracker {
   // The pseudo stack where frames are |TRACE_EVENT| names.
   std::vector<StackFrame> pseudo_stack_;
 
+  // Name of the file from which the current task is posted from.
+  const char* current_task_file_name_;
+
   DISALLOW_COPY_AND_ASSIGN(AllocationContextTracker);
 };