Revert "Re-enable offsetParent and fix in webui's paper-tooltip"

This reverts commit def5070.

Reason for revert: The polyfill I wrote, not the actual offsetParent
flag, broke something else. I'll need to figure out what I did wrong in
the polyfill and fix it in a reland: crbug.com/1264786

Fixed: 1264786

Original change's description:
> Re-enable offsetParent and fix in webui's paper-tooltip
>
> When I first changed the behavior of offsetParent for crbug.com/920069
> it broke some webui pages which used paper-toolip: crbug.com/1200750
>
> I minimized the broken case and determined that paper-tooltip was
> broken. I made a PR on paper-tooltip here, but it's unlikely that it
> will ever get merged:
> PolymerElements/paper-tooltip#156
>
> The fix to paper-tooltip is to polyfill the old offsetParent behavior in
> javascript. This patch applies the fix to paper-tooltip within chrome
> and re-enables the new offsetParent behavior.
>
> Fixed: 920069
> Change-Id: Ib39c34a6c15b44161a7942c7ee9cfd4afe68acf7
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3061435
> Commit-Queue: Joey Arhar <[email protected]>
> Reviewed-by: dpapad <[email protected]>
> Cr-Commit-Position: refs/heads/main@{#935992}

(cherry picked from commit 5c36b4e)

Change-Id: I27faaeb162a004130e4692595530ea5ab4300574
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3280437
Reviewed-by: Joey Arhar <[email protected]>
Reviewed-by: dpapad <[email protected]>
Auto-Submit: Joey Arhar <[email protected]>
Commit-Queue: dpapad <[email protected]>
Cr-Original-Commit-Position: refs/heads/main@{#941603}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3282903
Commit-Queue: Joey Arhar <[email protected]>
Cr-Commit-Position: refs/branch-heads/4692@{chromium#200}
Cr-Branched-From: 038cd96-refs/heads/main@{#938553}

third_party/polymer/v3_0/chromium.patch

@@ -433,71 +433,3 @@ index 6af2fa359336..c56a6737e1d8 100644
        --paper-grey-50: #fafafa;
        --paper-grey-100: #f5f5f5;
        --paper-grey-200: #eeeeee;
-diff --git a/components-chromium/paper-tooltip/paper-tooltip.js b/components-chromium/paper-tooltip/paper-tooltip.js
-index 303d1bbdfc787..09cdae71e5334 100644
---- a/components-chromium/paper-tooltip/paper-tooltip.js
-+++ b/components-chromium/paper-tooltip/paper-tooltip.js
-@@ -442,13 +442,16 @@ Polymer({
-    * @return {void}
-    */
-   updatePosition: function() {
--    if (!this._target || !this.offsetParent)
-+    if (!this._target)
-+      return;
-+    var offsetParent = this._composedOffsetParent();
-+    if (!offsetParent)
-       return;
-     var offset = this.offset;
-     // If a marginTop has been provided by the user (pre 1.0.3), use it.
-     if (this.marginTop != 14 && this.offset == 14)
-       offset = this.marginTop;
--    var parentRect = this.offsetParent.getBoundingClientRect();
-+    var parentRect = offsetParent.getBoundingClientRect();
-     var targetRect = this._target.getBoundingClientRect();
-     var thisRect = this.getBoundingClientRect();
-     var horizontalCenterOffset = (targetRect.width - thisRect.width) / 2;
-@@ -594,5 +597,44 @@ Polymer({
-     }
-     this.unlisten(this.$.tooltip, 'animationend', '_onAnimationEnd');
-     this.unlisten(this, 'mouseenter', 'hide');
-+  },
-+
-+  /**
-+   * Polyfills the old offsetParent behavior from before the spec was changed:
-+   * https://github.com/w3c/csswg-drafts/issues/159
-+   */
-+  _composedOffsetParent: function() {
-+    let offsetParent = this.offsetParent;
-+    let ancestor = this;
-+    let foundInsideSlot = false;
-+    while (ancestor && ancestor !== offsetParent) {
-+      const assignedSlot = ancestor.assignedSlot;
-+      if (assignedSlot) {
-+        let newOffsetParent = assignedSlot.offsetParent;
-+
-+        if (getComputedStyle(assignedSlot)['display'] === 'contents') {
-+          const hadStyleAttribute = assignedSlot.hasAttribute('style');
-+          const oldDisplay = assignedSlot.style.display;
-+          assignedSlot.style.display = getComputedStyle(ancestor).display;
-+
-+          newOffsetParent = assignedSlot.offsetParent;
-+
-+          assignedSlot.style.display = oldDisplay;
-+          if (!hadStyleAttribute) {
-+            assignedSlot.removeAttribute('style');
-+          }
-+        }
-+
-+        ancestor = assignedSlot;
-+        if (offsetParent !== newOffsetParent) {
-+          offsetParent = newOffsetParent;
-+          foundInsideSlot = true;
-+        }
-+      } else if (ancestor.host && foundInsideSlot) {
-+        break;
-+      }
-+      ancestor = ancestor.host || ancestor.parentNode;
-+    }
-+    return offsetParent;
-   }
- });

third_party/polymer/v3_0/components-chromium/paper-tooltip/paper-tooltip.js

@@ -442,16 +442,13 @@ Polymer({
    * @return {void}
    */
   updatePosition: function() {
-    if (!this._target)
-      return;
-    var offsetParent = this._composedOffsetParent();
-    if (!offsetParent)
+    if (!this._target || !this.offsetParent)
       return;
     var offset = this.offset;
     // If a marginTop has been provided by the user (pre 1.0.3), use it.
     if (this.marginTop != 14 && this.offset == 14)
       offset = this.marginTop;
-    var parentRect = offsetParent.getBoundingClientRect();
+    var parentRect = this.offsetParent.getBoundingClientRect();
     var targetRect = this._target.getBoundingClientRect();
     var thisRect = this.getBoundingClientRect();
     var horizontalCenterOffset = (targetRect.width - thisRect.width) / 2;
@@ -597,44 +594,5 @@ Polymer({
     }
     this.unlisten(this.$.tooltip, 'animationend', '_onAnimationEnd');
     this.unlisten(this, 'mouseenter', 'hide');
-  },
-
-  /**
-   * Polyfills the old offsetParent behavior from before the spec was changed:
-   * https://github.com/w3c/csswg-drafts/issues/159
-   */
-  _composedOffsetParent: function() {
-    let offsetParent = this.offsetParent;
-    let ancestor = this;
-    let foundInsideSlot = false;
-    while (ancestor && ancestor !== offsetParent) {
-      const assignedSlot = ancestor.assignedSlot;
-      if (assignedSlot) {
-        let newOffsetParent = assignedSlot.offsetParent;
-
-        if (getComputedStyle(assignedSlot)['display'] === 'contents') {
-          const hadStyleAttribute = assignedSlot.hasAttribute('style');
-          const oldDisplay = assignedSlot.style.display;
-          assignedSlot.style.display = getComputedStyle(ancestor).display;
-
-          newOffsetParent = assignedSlot.offsetParent;
-
-          assignedSlot.style.display = oldDisplay;
-          if (!hadStyleAttribute) {
-            assignedSlot.removeAttribute('style');
-          }
-        }
-
-        ancestor = assignedSlot;
-        if (offsetParent !== newOffsetParent) {
-          offsetParent = newOffsetParent;
-          foundInsideSlot = true;
-        }
-      } else if (ancestor.host && foundInsideSlot) {
-        break;
-      }
-      ancestor = ancestor.host || ancestor.parentNode;
-    }
-    return offsetParent;
   }
 });