Add Platform::physicalMemoryInBytes to WebKitPlatformSupportImpl.

webkit/child/webkitplatformsupport_impl.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 "webkit/child/webkitplatformsupport_impl.h"
 
 #include <math.h>
 
 #include <vector>
 
@@ skipping 841 matching lines @@
 }
 
 size_t WebKitPlatformSupportImpl::memoryUsageMB() {
   return getMemoryUsageMB(false);
 }
 
 size_t WebKitPlatformSupportImpl::actualMemoryUsageMB() {
   return getMemoryUsageMB(true);
 }
 
+size_t WebKitPlatformSupportImpl::physicalMemoryMB() {
+  return static_cast<size_t>(base::SysInfo::AmountOfPhysicalMemoryMB());
+}
+
 void WebKitPlatformSupportImpl::startHeapProfiling(
   const WebKit::WebString& prefix) {
   // FIXME(morrita): Make this built on windows.
 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
   HeapProfilerStart(prefix.utf8().data());
 #endif
 }
 
 void WebKitPlatformSupportImpl::stopHeapProfiling() {
 #if !defined(NO_TCMALLOC) && defined(USE_TCMALLOC) && !defined(OS_WIN)
@@ skipping 53 matching lines @@
   if (--shared_timer_suspended_ == 0 &&
       (!shared_timer_.IsRunning() ||
        shared_timer_fire_time_was_set_while_suspended_)) {
     shared_timer_fire_time_was_set_while_suspended_ = false;
     setSharedTimerFireInterval(
         shared_timer_fire_time_ - monotonicallyIncreasingTime());
   }
 }
 
 }  // namespace webkit_glue