Adds MemoryPressureListener.

chrome/browser/browser_process_platform_part_android.cc

Index: chrome/browser/browser_process_platform_part_android.cc
diff --git a/chrome/browser/browser_process_platform_part_android.cc b/chrome/browser/browser_process_platform_part_android.cc
index 4fdede00141b526c8ec98d4e86f69017749ed30f..ebc32c669a184d28beb9eff104e53f09a7c2ef40 100644
--- a/chrome/browser/browser_process_platform_part_android.cc
+++ b/chrome/browser/browser_process_platform_part_android.cc
@@ -2,10 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "chrome/browser/browser_process_platform_part_mac.h"
+#include "chrome/browser/browser_process_platform_part_android.h"
+
+#include "base/android/memory_pressure_handler_android.h"
 #include "chrome/browser/lifetime/application_lifetime_android.h"
+#include "chrome/browser/memory_purger.h"
 
 BrowserProcessPlatformPart::BrowserProcessPlatformPart() {
+  base::android::MemoryPressureHandlerAndroid::RegisterSystemCallback(
+      base::android::AttachCurrentThread());
+  MemoryPurger::RegisterMemoryPressureListener();
 }
 
 BrowserProcessPlatformPart::~BrowserProcessPlatformPart() {