[memory-infra] Add api to enable heap profiling in MemoryDumpManager

base/trace_event/heap_profiler_allocation_context_tracker.cc

Index: base/trace_event/heap_profiler_allocation_context_tracker.cc
diff --git a/base/trace_event/heap_profiler_allocation_context_tracker.cc b/base/trace_event/heap_profiler_allocation_context_tracker.cc
index b47dc16eddd02b2565bd18511d0490a17c488056..f926f90b81b8ad284cad2b1583ddfdf6d535ace0 100644
--- a/base/trace_event/heap_profiler_allocation_context_tracker.cc
+++ b/base/trace_event/heap_profiler_allocation_context_tracker.cc
@@ -183,11 +183,9 @@ bool AllocationContextTracker::GetContextSnapshot(AllocationContext* ctx) {
 
   switch (mode) {
     case CaptureMode::DISABLED:
-      {
-        break;
-      }
+    case CaptureMode::BACKGROUND:
+      break;
     case CaptureMode::PSEUDO_STACK:
-      {
         for (const PseudoStackFrame& stack_frame : pseudo_stack_) {
           if (backtrace == backtrace_end) {
             break;
@@ -196,9 +194,7 @@ bool AllocationContextTracker::GetContextSnapshot(AllocationContext* ctx) {
               StackFrame::FromTraceEventName(stack_frame.trace_event_name);
         }
         break;
-      }
     case CaptureMode::NATIVE_STACK:
-      {
         // Backtrace contract requires us to return bottom frames, i.e.
         // from main() and up. Stack unwinding produces top frames, i.e.
         // from this point and up until main(). We request many frames to
@@ -226,7 +222,6 @@ bool AllocationContextTracker::GetContextSnapshot(AllocationContext* ctx) {
           *backtrace++ = StackFrame::FromProgramCounter(frame);
         }
         break;
-      }
   }
 
   ctx->backtrace.frame_count = backtrace - std::begin(ctx->backtrace.frames);