Migrate HostZoomMap to live in StoragePartition.

content/browser/host_zoom_level_context.cc

Index: content/browser/host_zoom_level_context.cc
diff --git a/content/browser/host_zoom_level_context.cc b/content/browser/host_zoom_level_context.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5430dde8c4a17ba61b59b818f0f32b143a654031
--- /dev/null
+++ b/content/browser/host_zoom_level_context.cc
@@ -0,0 +1,26 @@
+// Copyright (c) 2014 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 "content/browser/host_zoom_level_context.h"
+
+#include "content/browser/host_zoom_map_impl.h"
+
+namespace content {
+
+HostZoomLevelContext::HostZoomLevelContext(ZoomLevelPrefsDelegate* delegate,
+                                           const base::FilePath& file_path,
+                                           double default_zoom_level)
+    : host_zoom_map_impl_(new HostZoomMapImpl(default_zoom_level)),
+      delegate_(delegate) {
+  if (delegate_)
+    delegate_->InitZoomLevels(file_path, host_zoom_map_impl_.get());
+}
+
+HostZoomLevelContext::~HostZoomLevelContext() {
+  // This needs to be released before the destructor for the HostZoomMapImpl
+  // is called.
+  delegate_ = NULL;
+}
+
+}  // namespace content