Migrate HostZoomMap to live in StoragePartition.

chrome/browser/ui/views/toolbar/wrench_menu.cc

Index: chrome/browser/ui/views/toolbar/wrench_menu.cc
diff --git a/chrome/browser/ui/views/toolbar/wrench_menu.cc b/chrome/browser/ui/views/toolbar/wrench_menu.cc
index 0ba893a3c70d87faa39466a13879e7f7bf7ead61..380db29fc8a381f117ceea4e577f0cd33730e9d5 100644
--- a/chrome/browser/ui/views/toolbar/wrench_menu.cc
+++ b/chrome/browser/ui/views/toolbar/wrench_menu.cc
@@ -495,10 +495,12 @@ class WrenchMenu::ZoomView : public WrenchMenuView {
         decrement_button_(NULL),
         fullscreen_button_(NULL),
         zoom_label_width_(0) {
-    content_zoom_subscription_ = HostZoomMap::GetForBrowserContext(
-        menu->browser_->profile())->AddZoomLevelChangedCallback(
-            base::Bind(&WrenchMenu::ZoomView::OnZoomLevelChanged,
-                       base::Unretained(this)));
+    content_zoom_subscription_ =
+        content::HostZoomMap::GetDefaultForBrowserContext(
+            menu->browser_->profile())
+            ->AddZoomLevelChangedCallback(
+                base::Bind(&WrenchMenu::ZoomView::OnZoomLevelChanged,
+                           base::Unretained(this)));
 
     browser_zoom_subscription_ = ZoomEventManager::GetForBrowserContext(
         menu->browser_->profile())->AddZoomLevelChangedCallback(