This creates a field trial to determine the best level for low memory

notification.

It creates a field trial with 7 groups: default (kernel default
value), turning notification off (relying on OOM killer only), 0MB, 25MB, 50MB
margin, 100MB margin, and 200MB margin.

Also, in order to set parameters for the trial, this CL creates
an API for setting the low memory margin.

BUG=chromium-os:20080
TEST=Ran on device several times, checked that the memory margin was
set correctly when the session started, and that different trial groups
were selected.


Review URL: http://codereview.chromium.org/10206029

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@135205 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 2 insertions, 1 deletions

diff --git a/content/browser/zygote_host_impl_linux.h b/content/browser/zygote_host_impl_linux.h
index 3c6e824..ad8dfac 100644
--- a/content/browser/zygote_host_impl_linux.h
+++ b/content/browser/zygote_host_impl_linux.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -55,6 +55,7 @@ class CONTENT_EXPORT ZygoteHostImpl : public content::ZygoteHost {
   virtual int GetSandboxStatus() const OVERRIDE;
   virtual void AdjustRendererOOMScore(base::ProcessHandle process_handle,
                                       int score) OVERRIDE;
+  virtual void AdjustLowMemoryMargin(int64 margin_mb) OVERRIDE;
 
  private:
   friend struct DefaultSingletonTraits<ZygoteHostImpl>;