Added memory pressure monitor for linux.

content/browser/browser_main_loop.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/browser_main_loop.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/logging.h"
@@ skipping 110 matching lines @@
 
 #if defined(OS_CHROMEOS)
 #include "base/memory/memory_pressure_monitor_chromeos.h"
 #include "chromeos/chromeos_switches.h"
 #endif
 
 #if defined(USE_GLIB)
 #include <glib-object.h>
 #endif
 
+#if defined(OS_LINUX)
+#include "base/memory/memory_pressure_monitor_linux.h"
+#endif
+
 #if defined(OS_LINUX) && defined(USE_UDEV)
 #include "content/browser/device_monitor_udev.h"
 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 #include "content/browser/device_monitor_mac.h"
 #endif
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 #include "content/browser/renderer_host/render_sandbox_host_linux.h"
 #include "content/browser/zygote_host/zygote_host_impl_linux.h"
 #include "sandbox/linux/suid/client/setuid_sandbox_host.h"
@@ skipping 516 matching lines @@
     result_code_ = parts_->PreCreateThreads();
   }
 
   // TODO(chrisha): Abstract away this construction mess to a helper function,
   // once MemoryPressureMonitor is made a concrete class.
 #if defined(OS_CHROMEOS)
   if (chromeos::switches::MemoryPressureHandlingEnabled()) {
     memory_pressure_monitor_.reset(new base::chromeos::MemoryPressureMonitor(
         chromeos::switches::GetMemoryPressureThresholds()));
   }
+#elif defined(OS_LINUX)
+  memory_pressure_monitor_.reset(new base::nix::MemoryPressureMonitor());
 #elif defined(OS_MACOSX) && !defined(OS_IOS)
   memory_pressure_monitor_.reset(new base::mac::MemoryPressureMonitor());
 #elif defined(OS_WIN)
   memory_pressure_monitor_.reset(CreateWinMemoryPressureMonitor(
       parsed_command_line_));
 #endif
 
 #if defined(ENABLE_PLUGINS)
   // Prior to any processing happening on the io thread, we create the
   // plugin service as it is predominantly used from the io thread,
@@ skipping 668 matching lines @@
   DCHECK(is_tracing_startup_);
 
   is_tracing_startup_ = false;
   TracingController::GetInstance()->DisableRecording(
       TracingController::CreateFileSink(
           startup_trace_file_,
           base::Bind(OnStoppedStartupTracing, startup_trace_file_)));
 }
 
 }  // namespace content