Bug 627293 - backout for Ts regression [r=me]

mobile/chrome/content/bindings/browser.xml

@@ -142,9 +142,6 @@
                 // Recalculate whether the visible area is actually in bounds
                 let view = self.getRootView();
                 view.scrollBy(0, 0);
-
-                // XXX Actually this fire a SetCacheViewport event as well as the
-                // scrolledAreaChanged handler in content/chrome/browser.js
                 view._updateCacheViewport();
                 break;
             }

mobile/chrome/content/browser.js

@@ -2544,7 +2544,6 @@ Tab.prototype = {
       }
     }
 
-    if (browser.contentWindowWidth != viewportW || browser.contentWindowHeight != viewportH)
     browser.setWindowSize(viewportW, viewportH);
   },
 
@@ -2858,9 +2857,7 @@ var ViewableAreaObserver = {
 
     let newWidth = this.width;
     let newHeight = this.height;
-    if (newHeight == oldHeight && newWidth == oldWidth)
+    if (newHeight != oldHeight || newWidth != oldWidth) {
-      return;
-
       Browser.styles["viewable-height"].height = newHeight + "px";
       Browser.styles["viewable-height"].maxHeight = newHeight + "px";
 
@@ -2870,7 +2867,6 @@ var ViewableAreaObserver = {
       for (let i = Browser.tabs.length - 1; i >= 0; i--) {
         let tab = Browser.tabs[i];
         tab.updateViewportSize();
-      tab.updateDefaultZoomLevel();
 
         // If the viewport width is still the same, the page layout has not
         // changed, so we can keep keep the same content on-screen.
@@ -2885,4 +2881,5 @@ var ViewableAreaObserver = {
         Elements.browsers.dispatchEvent(event);
       }, 0);
     }
+  }
 };