Make content_shell build on Win64

content/shell/shell_javascript_dialog_win.cc

Index: content/shell/shell_javascript_dialog_win.cc
===================================================================
--- content/shell/shell_javascript_dialog_win.cc	(revision 182606)
+++ content/shell/shell_javascript_dialog_win.cc	(working copy)
@@ -19,7 +19,7 @@
                                                    LPARAM lparam) {
   switch (message) {
     case WM_INITDIALOG: {
-      SetWindowLongPtr(dialog, DWL_USER, static_cast<LONG_PTR>(lparam));
+      SetWindowLongPtr(dialog, DWLP_USER, static_cast<LONG_PTR>(lparam));
       ShellJavaScriptDialog* owner =
           reinterpret_cast<ShellJavaScriptDialog*>(lparam);
       owner->dialog_win_ = dialog;
@@ -31,7 +31,7 @@
     }
     case WM_DESTROY: {
       ShellJavaScriptDialog* owner = reinterpret_cast<ShellJavaScriptDialog*>(
-          GetWindowLongPtr(dialog, DWL_USER));
+          GetWindowLongPtr(dialog, DWLP_USER));
       if (owner->dialog_win_) {
         owner->dialog_win_ = 0;
         owner->callback_.Run(false, string16());
@@ -41,7 +41,7 @@
     }
     case WM_COMMAND: {
       ShellJavaScriptDialog* owner = reinterpret_cast<ShellJavaScriptDialog*>(
-          GetWindowLongPtr(dialog, DWL_USER));
+          GetWindowLongPtr(dialog, DWLP_USER));
       string16 user_input;
       bool finish = false;
       bool result;
@@ -50,7 +50,7 @@
           finish = true;
           result = true;
           if (owner->message_type_ == JAVASCRIPT_MESSAGE_TYPE_PROMPT) {
-            size_t length =
+            int length =
                 GetWindowTextLength(GetDlgItem(dialog, IDC_PROMPTEDIT)) + 1;
             GetDlgItemText(dialog, IDC_PROMPTEDIT,
                            WriteInto(&user_input, length), length);