Migrate ChromeOS to base::MemoryPressureMonitor

content/browser/renderer_host/renderer_frame_manager.cc

Index: content/browser/renderer_host/renderer_frame_manager.cc
diff --git a/content/browser/renderer_host/renderer_frame_manager.cc b/content/browser/renderer_host/renderer_frame_manager.cc
index 6f3df4c1d4b3ec199dc56a3cb603f0b52ecdf23e..07d813d27259c137290fe4074bff7e2f4f7a117c 100644
--- a/content/browser/renderer_host/renderer_frame_manager.cc
+++ b/content/browser/renderer_host/renderer_frame_manager.cc
@@ -9,12 +9,12 @@
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/memory_pressure_listener.h"
+#include "base/memory/memory_pressure_monitor.h"
 #include "base/memory/shared_memory.h"
 #include "base/sys_info.h"
 #include "content/common/host_shared_bitmap_manager.h"
 
 #if defined(OS_CHROMEOS)
-#include "base/chromeos/memory_pressure_observer_chromeos.h"
 #include "content/browser/browser_main_loop.h"
 #endif
 
@@ -83,16 +83,15 @@ size_t RendererFrameManager::GetMaxNumberOfSavedFrames() const {
   if (!browser_main_loop)
     return max_number_of_saved_frames_;
 
-  base::MemoryPressureObserverChromeOS* observer =
-      browser_main_loop->memory_pressure_observer();
+  base::MemoryPressureMonitor* monitor = base::MemoryPressureMonitor::Get();
 
-  if (!observer)
+  if (!monitor)
     return max_number_of_saved_frames_;
 
   // Until we have a global OnMemoryPressureChanged event we need to query the
-  // value from our specific pressure observer.
+  // value from our specific pressure monitor.
   int percentage = 100;
-  switch (observer->GetCurrentPressureLevel()) {
+  switch (monitor->GetCurrentPressureLevel()) {
     case base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE:
       percentage = 100;
       break;