backout 3167daa05ef4

mobile/android/chrome/content/browser.js

@@ -162,12 +162,6 @@ var BrowserApp = {
   _tabs: [],
   _selectedTab: null,
 
-  get isTablet() {
-    let sysInfo = Cc["@mozilla.org/system-info;1"].getService(Ci.nsIPropertyBag2);
-    delete this.isTablet;
-    return this.isTablet = sysInfo.get("tablet");
-  },
-
   deck: null,
 
   startup: function startup() {
@@ -1074,8 +1068,7 @@ var BrowserApp = {
 
   scrollToFocusedInput: function(aBrowser, aAllowZoom = true) {
     let focused = this.getFocusedInput(aBrowser);
-
-    if (focused && !this.isTablet && !ViewportHandler.getViewportMetadata(aBrowser.contentWindow).hasMetaViewport) {
+    if (focused) {
       // _zoomToElement will handle not sending any message if this input is already mostly filling the screen
       BrowserEventHandler._zoomToElement(focused, -1, false, aAllowZoom);
     }
@@ -5432,7 +5425,6 @@ var ViewportHandler = {
 
     // Note: These values will be NaN if parseFloat or parseInt doesn't find a number.
     // Remember that NaN is contagious: Math.max(1, NaN) == Math.min(1, NaN) == NaN.
-    let hasMetaViewport = true;
     let scale = parseFloat(windowUtils.getDocumentMetadata("viewport-initial-scale"));
     let minScale = parseFloat(windowUtils.getDocumentMetadata("viewport-minimum-scale"));
     let maxScale = parseFloat(windowUtils.getDocumentMetadata("viewport-maximum-scale"));
@@ -5460,7 +5452,6 @@ var ViewportHandler = {
       if (doctype && /(WAP|WML|Mobile)/.test(doctype.publicId))
         return { defaultZoom: 1, autoSize: true, allowZoom: true };
 
-      hasMetaViewport = false;
       let defaultZoom = Services.prefs.getIntPref("browser.viewport.defaultZoom");
       if (defaultZoom >= 0) {
         scale = defaultZoom / 1000;
@@ -5485,8 +5476,7 @@ var ViewportHandler = {
       width: width,
       height: height,
       autoSize: autoSize,
-      allowZoom: allowZoom,
-      hasMetaViewport: hasMetaViewport
+      allowZoom: allowZoom
     };
   },