Migrate HostZoomMap to live in StoragePartition.

content/public/browser/storage_partition.h

Index: content/public/browser/storage_partition.h
diff --git a/content/public/browser/storage_partition.h b/content/public/browser/storage_partition.h
index 8e6fc9c5bae9dd84404f1b95f7e58901ca2f8d8f..09f6ca45ba6a6845f689d5961756a13519690b53 100644
--- a/content/public/browser/storage_partition.h
+++ b/content/public/browser/storage_partition.h
@@ -14,6 +14,7 @@
 #include "content/common/content_export.h"
 
 class GURL;
+class PrefService;
 
 namespace base {
 class Time;
@@ -43,6 +44,7 @@ class BrowserContext;
 class IndexedDBContext;
 class DOMStorageContext;
 class ServiceWorkerContext;
+class HostZoomMap;
 
 // Defines what persistent state a child process can access.
 //
@@ -62,6 +64,9 @@ class CONTENT_EXPORT StoragePartition {
   virtual DOMStorageContext* GetDOMStorageContext() = 0;
   virtual IndexedDBContext* GetIndexedDBContext() = 0;
   virtual ServiceWorkerContext* GetServiceWorkerContext() = 0;
+  virtual HostZoomMap* GetHostZoomMap() = 0;
+  // Exposed for tests.
+  virtual PrefService* GetZoomLevelPrefs() = 0;
 
   static const uint32 REMOVE_DATA_MASK_APPCACHE        = 1 << 0;
   static const uint32 REMOVE_DATA_MASK_COOKIES         = 1 << 1;