First part of remembering platform app window geometry.

chrome/browser/extensions/extension_system.cc

Index: chrome/browser/extensions/extension_system.cc
diff --git a/chrome/browser/extensions/extension_system.cc b/chrome/browser/extensions/extension_system.cc
index e6f11eafe626e19b65926f0afd5146a29d786c9d..ef6b5c411885e4cbae5b1a84834ac49922e9e514 100644
--- a/chrome/browser/extensions/extension_system.cc
+++ b/chrome/browser/extensions/extension_system.cc
@@ -27,6 +27,7 @@
 #include "chrome/browser/extensions/management_policy.h"
 #include "chrome/browser/extensions/message_service.h"
 #include "chrome/browser/extensions/navigation_observer.h"
+#include "chrome/browser/extensions/shell_window_geometry_cache.h"
 #include "chrome/browser/extensions/state_store.h"
 #include "chrome/browser/extensions/unpacked_installer.h"
 #include "chrome/browser/extensions/user_script_master.h"
@@ -88,6 +89,10 @@ void ExtensionSystemImpl::Shared::InitPrefs() {
   state_store_.reset(new StateStore(
       profile_,
       profile_->GetPath().AppendASCII(ExtensionService::kStateStoreName)));
+
+  shell_window_geometry_cache_.reset(new ShellWindowGeometryCache(
+    profile_, state_store_.get()));
+
 }
 
 void ExtensionSystemImpl::Shared::RegisterManagementPolicyProviders() {
@@ -195,6 +200,11 @@ StateStore* ExtensionSystemImpl::Shared::state_store() {
   return state_store_.get();
 }
 
+ShellWindowGeometryCache* ExtensionSystemImpl::Shared::
+    shell_window_geometry_cache() {
+  return shell_window_geometry_cache_.get();
+}
+
 ExtensionService* ExtensionSystemImpl::Shared::extension_service() {
   return extension_service_.get();
 }
@@ -322,6 +332,10 @@ StateStore* ExtensionSystemImpl::state_store() {
   return shared_->state_store();
 }
 
+ShellWindowGeometryCache* ExtensionSystemImpl::shell_window_geometry_cache() {
+  return shared_->shell_window_geometry_cache();
+}
+
 ExtensionInfoMap* ExtensionSystemImpl::info_map() {
   return shared_->info_map();
 }