memory-infra: Switch to MemoryPeakDetector and simplify MemoryDumpScheduler

base/trace_event/memory_peak_detector.h

Index: base/trace_event/memory_peak_detector.h
diff --git a/base/trace_event/memory_peak_detector.h b/base/trace_event/memory_peak_detector.h
index d2da9ca0c9985b028f00f6e429dcf545d63757ba..c08d91bd8a63dd7bb9320d32f46614824d3acdd8 100644
--- a/base/trace_event/memory_peak_detector.h
+++ b/base/trace_event/memory_peak_detector.h
@@ -47,7 +47,12 @@ class BASE_EXPORT MemoryPeakDetector {
   };
 
   // Peak detector configuration, passed to Start().
-  struct Config {
+  struct BASE_EXPORT Config {
+    Config();
+    Config(uint32_t polling_interval_ms,
+           uint32_t min_time_between_peaks_ms,
+           bool enable_verbose_poll_tracing);
+
     // The rate at which memory will be polled. Polls will happen on the task
     // runner passed to Setup().
     uint32_t polling_interval_ms;