Get rid of a LazyInstance usage to get rid of code execution at static init...

Get rid of a LazyInstance usage to get rid of code execution at static init time. This doesn't need to be thread safe.

BUG=94925
Review URL: http://codereview.chromium.org/7756015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@99815 0039d316-1c4b-4281-b951-d872f2087c98

webkit/appcache/web_application_cache_host_impl.cc

@@ -6,7 +6,6 @@
 
 #include "base/compiler_specific.h"
 #include "base/id_map.h"
-#include "base/lazy_instance.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDataSource.h"
@@ -28,9 +27,6 @@ namespace appcache {
 
 namespace {
 
-typedef IDMap<WebApplicationCacheHostImpl> HostsMap;
-static base::LazyInstance<HostsMap> g_hosts_map(base::LINKER_INITIALIZED);
-
 // Note: the order of the elements in this array must match those
 // of the EventID enum in appcache_interfaces.h.
 const char* kEventNames[] = {
@@ -38,6 +34,13 @@ const char* kEventNames[] = {
   "UpdateReady", "Cached", "Obsolete"
 };
 
+typedef IDMap<WebApplicationCacheHostImpl> HostsMap;
+
+HostsMap* all_hosts() {
+  static HostsMap* map = new HostsMap;
+  return map;
+}
+
 GURL ClearUrlRef(const GURL& url) {
   if (!url.has_ref())
     return url;
@@ -49,7 +52,7 @@ GURL ClearUrlRef(const GURL& url) {
 }  // anon namespace
 
 WebApplicationCacheHostImpl* WebApplicationCacheHostImpl::FromId(int id) {
-  return g_hosts_map.Get().Lookup(id);
+  return all_hosts()->Lookup(id);
 }
 
 WebApplicationCacheHostImpl* WebApplicationCacheHostImpl::FromFrame(
@@ -68,7 +71,7 @@ WebApplicationCacheHostImpl::WebApplicationCacheHostImpl(
     AppCacheBackend* backend)
     : client_(client),
       backend_(backend),
-      ALLOW_THIS_IN_INITIALIZER_LIST(host_id_(g_hosts_map.Get().Add(this))),
+      ALLOW_THIS_IN_INITIALIZER_LIST(host_id_(all_hosts()->Add(this))),
       status_(UNCACHED),
       is_scheme_supported_(false),
       is_get_method_(false),
@@ -81,7 +84,7 @@ WebApplicationCacheHostImpl::WebApplicationCacheHostImpl(
 
 WebApplicationCacheHostImpl::~WebApplicationCacheHostImpl() {
   backend_->UnregisterHost(host_id_);
-  g_hosts_map.Get().Remove(host_id_);
+  all_hosts()->Remove(host_id_);
 }
 
 void WebApplicationCacheHostImpl::OnCacheSelected(