MD History: promote menu button to show clear browsing data in narrow mode

chrome/browser/resources/md_downloads/crisper.js

Index: chrome/browser/resources/md_downloads/crisper.js
diff --git a/chrome/browser/resources/md_downloads/crisper.js b/chrome/browser/resources/md_downloads/crisper.js
index 81c71e18c73961bafa50cbaa71c7c61aca58692e..529ffcc2d2b80a290d8daafec895d85e7938c7f4 100644
--- a/chrome/browser/resources/md_downloads/crisper.js
+++ b/chrome/browser/resources/md_downloads/crisper.js
@@ -6089,6 +6089,188 @@ Polymer({
   }
 });
 
+Polymer({
+  is: 'paper-tooltip',
+  hostAttributes: {
+    role: 'tooltip',
+    tabindex: -1
+  },
+  behaviors: [ Polymer.NeonAnimationRunnerBehavior ],
+  properties: {
+    "for": {
+      type: String,
+      observer: '_forChanged'
+    },
+    manualMode: {
+      type: Boolean,
+      value: false
+    },
+    position: {
+      type: String,
+      value: 'bottom'
+    },
+    fitToVisibleBounds: {
+      type: Boolean,
+      value: false
+    },
+    offset: {
+      type: Number,
+      value: 14
+    },
+    marginTop: {
+      type: Number,
+      value: 14
+    },
+    animationDelay: {
+      type: Number,
+      value: 500
+    },
+    animationConfig: {
+      type: Object,
+      value: function() {
+        return {
+          entry: [ {
+            name: 'fade-in-animation',
+            node: this,
+            timing: {
+              delay: 0
+            }
+          } ],
+          exit: [ {
+            name: 'fade-out-animation',
+            node: this
+          } ]
+        };
+      }
+    },
+    _showing: {
+      type: Boolean,
+      value: false
+    }
+  },
+  listeners: {
+    'neon-animation-finish': '_onAnimationFinish'
+  },
+  get target() {
+    var parentNode = Polymer.dom(this).parentNode;
+    var ownerRoot = Polymer.dom(this).getOwnerRoot();
+    var target;
+    if (this.for) {
+      target = Polymer.dom(ownerRoot).querySelector('#' + this.for);
+    } else {
+      target = parentNode.nodeType == Node.DOCUMENT_FRAGMENT_NODE ? ownerRoot.host : parentNode;
+    }
+    return target;
+  },
+  attached: function() {
+    this._target = this.target;
+    if (this.manualMode) return;
+    this.listen(this._target, 'mouseenter', 'show');
+    this.listen(this._target, 'focus', 'show');
+    this.listen(this._target, 'mouseleave', 'hide');
+    this.listen(this._target, 'blur', 'hide');
+    this.listen(this._target, 'tap', 'hide');
+    this.listen(this, 'mouseenter', 'hide');
+  },
+  detached: function() {
+    if (this._target && !this.manualMode) {
+      this.unlisten(this._target, 'mouseenter', 'show');
+      this.unlisten(this._target, 'focus', 'show');
+      this.unlisten(this._target, 'mouseleave', 'hide');
+      this.unlisten(this._target, 'blur', 'hide');
+      this.unlisten(this._target, 'tap', 'hide');
+      this.unlisten(this, 'mouseenter', 'hide');
+    }
+  },
+  show: function() {
+    if (this._showing) return;
+    if (Polymer.dom(this).textContent.trim() === '') return;
+    this.cancelAnimation();
+    this._showing = true;
+    this.toggleClass('hidden', false, this.$.tooltip);
+    this.updatePosition();
+    this.animationConfig.entry[0].timing.delay = this.animationDelay;
+    this._animationPlaying = true;
+    this.playAnimation('entry');
+  },
+  hide: function() {
+    if (!this._showing) {
+      return;
+    }
+    if (this._animationPlaying) {
+      this.cancelAnimation();
+      this._showing = false;
+      this._onAnimationFinish();
+      return;
+    }
+    this._showing = false;
+    this._animationPlaying = true;
+    this.playAnimation('exit');
+  },
+  _forChanged: function() {
+    this._target = this.target;
+  },
+  updatePosition: function() {
+    if (!this._target || !this.offsetParent) return;
+    var offset = this.offset;
+    if (this.marginTop != 14 && this.offset == 14) offset = this.marginTop;
+    var parentRect = this.offsetParent.getBoundingClientRect();
+    var targetRect = this._target.getBoundingClientRect();
+    var thisRect = this.getBoundingClientRect();
+    var horizontalCenterOffset = (targetRect.width - thisRect.width) / 2;
+    var verticalCenterOffset = (targetRect.height - thisRect.height) / 2;
+    var targetLeft = targetRect.left - parentRect.left;
+    var targetTop = targetRect.top - parentRect.top;
+    var tooltipLeft, tooltipTop;
+    switch (this.position) {
+     case 'top':
+      tooltipLeft = targetLeft + horizontalCenterOffset;
+      tooltipTop = targetTop - thisRect.height - offset;
+      break;
+
+     case 'bottom':
+      tooltipLeft = targetLeft + horizontalCenterOffset;
+      tooltipTop = targetTop + targetRect.height + offset;
+      break;
+
+     case 'left':
+      tooltipLeft = targetLeft - thisRect.width - offset;
+      tooltipTop = targetTop + verticalCenterOffset;
+      break;
+
+     case 'right':
+      tooltipLeft = targetLeft + targetRect.width + offset;
+      tooltipTop = targetTop + verticalCenterOffset;
+      break;
+    }
+    if (this.fitToVisibleBounds) {
+      if (tooltipLeft + thisRect.width > window.innerWidth) {
+        this.style.right = '0px';
+        this.style.left = 'auto';
+      } else {
+        this.style.left = Math.max(0, tooltipLeft) + 'px';
+        this.style.right = 'auto';
+      }
+      if (tooltipTop + thisRect.height > window.innerHeight) {
+        this.style.bottom = '0px';
+        this.style.top = 'auto';
+      } else {
+        this.style.top = Math.max(0, tooltipTop) + 'px';
+        this.style.bottom = 'auto';
+      }
+    } else {
+      this.style.left = tooltipLeft + 'px';
+      this.style.top = tooltipTop + 'px';
+    }
+  },
+  _onAnimationFinish: function() {
+    this._animationPlaying = false;
+    if (!this._showing) {
+      this.toggleClass('hidden', true, this.$.tooltip);
+    }
+  }
+});
+
 (function() {
   'use strict';
   Polymer.IronA11yAnnouncer = Polymer({
@@ -6723,11 +6905,10 @@ Polymer({
     searchPrompt: String,
     clearLabel: String,
     menuLabel: String,
+    menuPromo: String,
     spinnerActive: Boolean,
-    showMenu: {
-      type: Boolean,
-      value: false
-    },
+    showMenu: Boolean,
+    showMenuPromo: Boolean,
     narrow_: {
       type: Boolean,
       reflectToAttribute: true
@@ -6735,13 +6916,33 @@ Polymer({
     showingSearch_: {
       type: Boolean,
       reflectToAttribute: true
+    },
+    showingMenuPromo_: {
+      type: Boolean,
+      computed: 'computeShowingMenuPromo_(showMenuPromo, narrow_)',
+      observer: 'showingMenuPromoChanged_'
     }
   },
   getSearchField: function() {
     return this.$.search;
   },
-  onMenuTap_: function(e) {
+  computeShowingMenuPromo_: function(showMenuPromo, narrow) {
+    return showMenuPromo && narrow;
+  },
+  onMenuTap_: function() {
     this.fire('cr-menu-tap');
+    this.onMenuPromoCloseTap_();
+  },
+  onMenuPromoCloseTap_: function() {
+    this.fire('cr-menu-promo-shown');
+  },
+  showingMenuPromoChanged_: function() {
+    Polymer.RenderStatus.afterNextRender(this, function() {
+      if (this.showingMenuPromo_) this.$$('paper-tooltip').show();
+    }.bind(this));
+  },
+  titleIfNotShowingMenuPromo_: function(title, showingMenuPromo) {
+    return showingMenuPromo ? '' : title;
   }
 });