content: Release all free discardable memory when idle.

chrome/common/crash_keys.cc

 // Copyright (c) 2013 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 "chrome/common/crash_keys.h"
 
 #include "base/command_line.h"
 #include "base/format_macros.h"
 #include "base/logging.h"
 #include "base/strings/string_split.h"
@@ skipping 129 matching lines @@
     { kGPUVertexShaderVersion, kSmallSize },
 #if defined(OS_MACOSX)
     { kGPUGLVersion, kSmallSize },
 #elif defined(OS_POSIX)
     { kGPUVendor, kSmallSize },
     { kGPURenderer, kSmallSize },
 #endif
 
     // base/:
     { "dm-usage", kSmallSize },
+    { "dm-usage-free", kSmallSize },
     { "total-dm-usage", kSmallSize },
     // content/:
     { kFontKeyName, kSmallSize},
     { "ppapi_path", kMediumSize },
     { "subresource_url", kLargeSize },
 #if defined(OS_CHROMEOS)
     { kNumberOfUsers, kSmallSize },
 #endif
 #if defined(OS_MACOSX)
     { mac::kFirstNSException, kMediumSize },
@@ skipping 243 matching lines @@
 }
 
 ScopedPrinterInfo::~ScopedPrinterInfo() {
   for (size_t i = 0; i < kPrinterInfoCount; ++i) {
     std::string key = base::StringPrintf(kPrinterInfo, i + 1);
     base::debug::ClearCrashKey(key);
   }
 }
 
 }  // namespace crash_keys