Chrome OS: Fix a few minor issues in oobe-dialog attributes.

min-height/min-width => height/width
if(getAttribute) => if(hasAttribute)

Bug: 864686
Change-Id: If179f64af2d3ced1f2902a6c1b205a37558f709c
Reviewed-on: https://chromium-review.googlesource.com/1182502Reviewed-by: Wenzhao (Colin) Zang <wzang@chromium.org>
Commit-Queue: Alexander Alekseev <alemate@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584637}

chrome/browser/resources/chromeos/login/oobe_dialog.js

@@ -65,9 +65,9 @@ Polymer({
   },
 
   onBeforeShow: function() {
-    var isOobe = Oobe && Oobe.getInstance() &&
+    var isOobe = window.hasOwnProperty('Oobe') && Oobe.getInstance() &&
         Oobe.getInstance().displayType == DISPLAY_TYPE.OOBE;
-    if (isOobe || document.documentElement.getAttribute('full-screen-dialog'))
+    if (isOobe || document.documentElement.hasAttribute('full-screen-dialog'))
       this.fullScreenDialog = true;
   },
 

chrome/browser/resources/chromeos/login/oobe_dialog_host.css

@@ -14,9 +14,9 @@
   border-radius: unset;
   box-shadow: unset;
   flex-direction: column;
-  min-height: 640px;
-  min-width: 768px;
+  height: 640px;
   position: relative;
+  width: 768px;
 }
 
 :host(:not([not-a-dialog]):not([full-screen-dialog])) {

chrome/browser/resources/chromeos/login/oobe_dialog_host_behavior.js

@@ -43,7 +43,7 @@ var OobeDialogHostBehavior = {
    * Pass down fullScreenDialog attribute.
    */
   onBeforeShow: function() {
-    if (document.documentElement.getAttribute('full-screen-dialog'))
+    if (document.documentElement.hasAttribute('full-screen-dialog'))
       this.fullScreenDialog = true;
 
     this.propagateFullScreenMode();

chrome/browser/resources/chromeos/login/oobe_welcome.js

@@ -83,18 +83,19 @@ Polymer({
   },
 
   onBeforeShow: function() {
-    if (document.documentElement.getAttribute('full-screen-dialog'))
-      this.fullScreenDialog = true;
-
-    if (this.fullScreenDialog) {
-      this.$.welcomeScreen.fullScreenDialog = true;
-    }
-
     this.behaviors.forEach((behavior) => {
       if (behavior.onBeforeShow)
         behavior.onBeforeShow.call(this);
     });
 
+    if (this.fullScreenDialog)
+      this.$.welcomeScreen.fullScreenDialog = true;
+
+    this.$.welcomeScreen.onBeforeShow();
+    let dialogs = Polymer.dom(this.root).querySelectorAll('oobe-dialog');
+    for (let dialog of dialogs)
+      dialog.onBeforeShow();
+
     let activeScreen = this.getActiveScreen_();
     if (activeScreen.show)
       activeScreen.show();