EULA Screen: Adapt screen for smaller resolution.

Scroll view to show auto-selected toggle.
Fix layout issue with zero height divs.

Bug: 1010166
Change-Id: I56399b4a43da16797b3b25a818b8d39f3a4c89e9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1848380Reviewed-by: Denis Kuznetsov <antrim@chromium.org>
Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Commit-Queue: Roman Aleksandrov <raleksandrov@google.com>
Cr-Commit-Position: refs/heads/master@{#705192}

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

@@ -75,6 +75,14 @@ Polymer({
       this.fullScreenDialog = true;
   },
 
+  /**
+   * Scroll to the bottom of footer container.
+   */
+  scrollToBottom: function() {
+    var el = this.$$('#footer-container');
+    el.scrollTop = el.scrollHeight;
+  },
+
   /**
    * This is called from oobe_welcome when this dialog is shown.
    */

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

@@ -19,6 +19,7 @@ a {
 #installationSettings,
 #logging {
   font-size: 13px;
+  min-height: unset;
 }
 
 #crosEulaFrame {

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

@@ -58,10 +58,10 @@ Polymer({
   },
 
   /**
-   * Flag that ensures that OOBE configuration is applied only once.
+   * Flag that ensures that eula screen set up once.
    * @private {boolean}
    */
-  configuration_applied_: false,
+  initialized_: false,
 
   focus: function() {
     if (this.eulaLoadingScreenShown) {
@@ -77,7 +77,19 @@ Polymer({
       if (behavior.onBeforeShow)
         behavior.onBeforeShow.call(this);
     });
-    window.setTimeout(this.applyOobeConfiguration_.bind(this), 0);
+    window.setTimeout(this.initializeScreen_.bind(this), 0);
+  },
+
+  /**
+   * Set up dialog before shown it for the first time.
+   * @private
+   */
+  initializeScreen_: function() {
+    if (this.initialized_)
+      return;
+    this.$.eulaDialog.scrollToBottom();
+    this.applyOobeConfiguration_();
+    this.initialized_ = true;
   },
 
   /**
@@ -85,8 +97,6 @@ Polymer({
    * @private
    */
   applyOobeConfiguration_: function() {
-    if (this.configuration_applied_)
-      return;
     var configuration = Oobe.getInstance().getOobeConfiguration();
     if (!configuration)
       return;
@@ -96,7 +106,6 @@ Polymer({
     if (configuration.eulaAutoAccept) {
       this.eulaAccepted_();
     }
-    this.configuration_applied_ = true;
   },
 
   /**