Remove obsolete low-memory related methods from platform implemenation.

BUG=260596
R=jamesr@chromium.org

Review URL: https://codereview.chromium.org/20142006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@213803 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 0 insertions, 30 deletions

diff --git a/webkit/child/webkitplatformsupport_impl.cc b/webkit/child/webkitplatformsupport_impl.cc
index e33938e..364429d 100644
--- a/webkit/child/webkitplatformsupport_impl.cc
+++ b/webkit/child/webkitplatformsupport_impl.cc
@@ -24,7 +24,6 @@
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/synchronization/lock.h"
-#include "base/sys_info.h"
 #include "base/time/time.h"
 #include "content/public/common/webplugininfo.h"
 #include "grit/webkit_chromium_resources.h"
@@ -821,29 +820,6 @@ size_t WebKitPlatformSupportImpl::actualMemoryUsageMB() {
   return getMemoryUsageMB(true);
 }
 
-#if defined(OS_ANDROID)
-size_t WebKitPlatformSupportImpl::lowMemoryUsageMB() {
-  // If memory usage is below this threshold, do not bother forcing GC.
-  // Allow us to use up to our memory class value before V8's GC kicks in.
-  // These values have been determined by experimentation.
-  return base::SysInfo::DalvikHeapSizeMB() / 2;
-}
-
-size_t WebKitPlatformSupportImpl::highMemoryUsageMB() {
-  // If memory usage is above this threshold, force GC more aggressively.
-  return base::SysInfo::DalvikHeapSizeMB() * 3 / 4;
-}
-
-size_t WebKitPlatformSupportImpl::highUsageDeltaMB() {
-  // If memory usage is above highMemoryUsageMB() and memory usage increased by
-  // more than highUsageDeltaMB() since the last GC, then force GC.
-  // Note that this limit should be greater than the amount of memory for V8
-  // internal data structures that are released on GC and reallocated during JS
-  // execution (about 8MB). Otherwise, it will cause too aggressive GCs.
-  return base::SysInfo::DalvikHeapSizeMB() / 8;
-}
-#endif
-
 void WebKitPlatformSupportImpl::startHeapProfiling(
   const WebKit::WebString& prefix) {
   // FIXME(morrita): Make this built on windows.
diff --git a/webkit/child/webkitplatformsupport_impl.h b/webkit/child/webkitplatformsupport_impl.h
index e9077582..b9ed7e8 100644
--- a/webkit/child/webkitplatformsupport_impl.h
+++ b/webkit/child/webkitplatformsupport_impl.h
@@ -49,12 +49,6 @@ class WEBKIT_CHILD_EXPORT WebKitPlatformSupportImpl :
       const WebKit::WebURL& url);
   virtual size_t memoryUsageMB();
   virtual size_t actualMemoryUsageMB();
-#if defined(OS_ANDROID)  // Other OSes just use the default values.
-  // TODO(jochen): Remove these.
-  virtual size_t lowMemoryUsageMB();
-  virtual size_t highMemoryUsageMB();
-  virtual size_t highUsageDeltaMB();
-#endif
 
   virtual void startHeapProfiling(const WebKit::WebString& prefix);
   virtual void stopHeapProfiling() OVERRIDE;