MD Settings: Prevent erroneous scroll when navigating subpage->subpage.

chrome/browser/resources/settings/settings_page/main_page_behavior.js

Index: chrome/browser/resources/settings/settings_page/main_page_behavior.js
diff --git a/chrome/browser/resources/settings/settings_page/main_page_behavior.js b/chrome/browser/resources/settings/settings_page/main_page_behavior.js
index 600499e704e72bcd590b9649e15e087b4fd2290b..c38ae43f347c89c58264a6cac18b83c697aeb6f6 100644
--- a/chrome/browser/resources/settings/settings_page/main_page_behavior.js
+++ b/chrome/browser/resources/settings/settings_page/main_page_behavior.js
@@ -290,10 +290,12 @@ var MainPageBehaviorImpl = {
             this.getSection(settings.getCurrentRoute().section);
 
         // Scroll to the new section or the original position.
-        if (newSection && !settings.lastRouteChangeWasPopstate())
+        if (newSection && !settings.lastRouteChangeWasPopstate() &&
+            !settings.getCurrentRoute().isSubpage()) {
           newSection.scrollIntoView();
-        else
+        } else {
           this.scroller.scrollTop = this.origScrollTop_;
+        }
 
         this.currentAnimation_ = section.animateCollapse(
             /** @type {!HTMLElement} */(this.scroller));