This adds periodic OOM score adjustment, based on the last access time

chrome/browser/browser_main.cc

Index: chrome/browser/browser_main.cc
diff --git a/chrome/browser/browser_main.cc b/chrome/browser/browser_main.cc
index b1ef3960040b00b54276b27f2251de777ceafc61..9927502ca31c3199ea2f97941ffef7321c53191f 100644
--- a/chrome/browser/browser_main.cc
+++ b/chrome/browser/browser_main.cc
@@ -105,6 +105,7 @@
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/boot_times_loader.h"
+#include "chrome/browser/oom_priority_manager.h"
 #endif
 
 // TODO(port): several win-only methods have been pulled out of this, but
@@ -1401,9 +1402,9 @@ int BrowserMain(const MainFunctionParams& parameters) {
   bool record_search_engine = is_first_run && !profile->IsOffTheRecord();
 #endif
 
-    // ChildProcess:: is a misnomer unless you consider context.  Use
-    // of --wait-for-debugger only makes sense when Chrome itself is a
-    // child process (e.g. when launched by PyAuto).
+  // ChildProcess:: is a misnomer unless you consider context.  Use
+  // of --wait-for-debugger only makes sense when Chrome itself is a
+  // child process (e.g. when launched by PyAuto).
   if (parsed_command_line.HasSwitch(switches::kWaitForDebugger)) {
     ChildProcess::WaitForDebugger(L"Browser");
   }
@@ -1421,6 +1422,17 @@ int BrowserMain(const MainFunctionParams& parameters) {
     }
   }
 
+#if defined(OS_CHROMEOS)
+  // Run the Out of Memory priority manager while in this scope.  Wait
+  // until here to start so that we give the most amount of time for
+  // the other services to start up before we start adjusting the oom
+  // priority.  In reality, it doesn't matter much where in this scope
+  // this is started, but it must be started in this scope so it will
+  // also be terminated when this scope exits.
+  scoped_ptr<browser::OomPriorityManager> oom_priority_manager(
+      new browser::OomPriorityManager);
+#endif
+
   int result_code = ResultCodes::NORMAL_EXIT;
   if (parameters.ui_task) {
     // We are in test mode. Run one task and enter the main message loop.