[iOS] Add more Tab Grid metrics.

This CL adds metrics to track:
  - Use of the new Close All and Undo Close All controls.
  - Use of interactive tab grid reordering.

Bug: 880845
Cq-Include-Trybots: luci.chromium.try:ios-simulator-cronet;luci.chromium.try:ios-simulator-full-configs
Change-Id: I822044ea7bd1065a987d50dd03842662fa618a41
Reviewed-on: https://chromium-review.googlesource.com/1206433Reviewed-by: edchin <edchin@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Mark Cogan <marq@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589468}

ios/chrome/browser/ui/tab_grid/grid/grid_view_controller.mm

@@ -67,7 +67,8 @@ NSIndexPath* CreateIndexPath(NSInteger index) {
 @property(nonatomic, strong) GridLayout* defaultLayout;
 // The layout used while the grid is being reordered.
 @property(nonatomic, strong) UICollectionViewLayout* reorderingLayout;
-
+// YES if, when reordering is enabled, the order of the cells has changed.
+@property(nonatomic, assign) BOOL hasChangedOrder;
 @end
 
 @implementation GridViewController
@@ -88,6 +89,7 @@ NSIndexPath* CreateIndexPath(NSInteger index) {
 @synthesize emptyStateAnimator = _emptyStateAnimator;
 @synthesize defaultLayout = _defaultLayout;
 @synthesize reorderingLayout = _reorderingLayout;
+@synthesize hasChangedOrder = _hasChangedOrder;
 
 - (instancetype)init {
   if (self = [super init]) {
@@ -286,7 +288,7 @@ NSIndexPath* CreateIndexPath(NSInteger index) {
   GridItem* item = self.items[source];
   [self.items removeObjectAtIndex:source];
   [self.items insertObject:item atIndex:destination];
-
+  self.hasChangedOrder = YES;
   [self.delegate gridViewController:self
                   didMoveItemWithID:item.identifier
                             toIndex:destination];
@@ -587,6 +589,8 @@ NSIndexPath* CreateIndexPath(NSInteger index) {
       if (!moving) {
         gesture.enabled = NO;
       } else {
+        base::RecordAction(
+            base::UserMetricsAction("MobileTabGridBeganReordering"));
         CGPoint cellCenter =
             [self.collectionView cellForItemAtIndexPath:path].center;
         self.itemReorderTouchPoint =
@@ -624,12 +628,14 @@ NSIndexPath* CreateIndexPath(NSInteger index) {
                                             animated:YES];
       }];
       [self.collectionView endInteractiveMovement];
+      [self recordInteractiveReordering];
       [CATransaction commit];
       break;
     }
     case UIGestureRecognizerStateCancelled:
       self.itemReorderTouchPoint = CGPointZero;
       [self.collectionView cancelInteractiveMovement];
+      [self recordInteractiveReordering];
       [self.collectionView setCollectionViewLayout:self.defaultLayout
                                           animated:YES];
       // Re-enable cancelled gesture.
@@ -649,4 +655,14 @@ NSIndexPath* CreateIndexPath(NSInteger index) {
   [self.collectionView updateInteractiveMovementTargetPosition:targetLocation];
 }
 
+- (void)recordInteractiveReordering {
+  if (self.hasChangedOrder) {
+    base::RecordAction(base::UserMetricsAction("MobileTabGridReordered"));
+  } else {
+    base::RecordAction(
+        base::UserMetricsAction("MobileTabGridEndedWithoutReordering"));
+  }
+  self.hasChangedOrder = NO;
+}
+
 @end

ios/chrome/browser/ui/tab_grid/tab_grid_view_controller.mm

@@ -1245,14 +1245,20 @@ NSUInteger GetPageIndexFromPage(TabGridPage page) {
 - (void)closeAllButtonTapped:(id)sender {
   switch (self.currentPage) {
     case TabGridPageIncognitoTabs:
+      base::RecordAction(
+          base::UserMetricsAction("MobileTabGridCloseAllIncognitoTabs"));
       [self.incognitoTabsDelegate closeAllItems];
       break;
     case TabGridPageRegularTabs:
       DCHECK_EQ(self.undoCloseAllAvailable,
                 self.regularTabsViewController.gridEmpty);
       if (self.undoCloseAllAvailable) {
+        base::RecordAction(
+            base::UserMetricsAction("MobileTabGridUndoCloseAllRegularTabs"));
         [self.regularTabsDelegate undoCloseAllItems];
       } else {
+        base::RecordAction(
+            base::UserMetricsAction("MobileTabGridCloseAllRegularTabs"));
         [self.regularTabsDelegate saveAndCloseAllItems];
       }
       self.undoCloseAllAvailable = !self.undoCloseAllAvailable;

tools/metrics/actions/actions.xml

@@ -11766,6 +11766,57 @@ should be able to be added at any place in this file.
   </description>
 </action>
 
+<action name="MobileTabGridBeganReordering">
+  <owner>edchin@chromium.org</owner>
+  <owner>marq@chromium.org</owner>
+  <description>User in the iOS tab grid began reordering tabs.</description>
+</action>
+
+<action name="MobileTabGridCloseAllIncognitoTabs">
+  <owner>edchin@chromium.org</owner>
+  <owner>marq@chromium.org</owner>
+  <description>
+    User in the iOS tab grid used the Close All control while viewing the
+    incognito tabs.
+  </description>
+</action>
+
+<action name="MobileTabGridCloseAllRegularTabs">
+  <owner>edchin@chromium.org</owner>
+  <owner>marq@chromium.org</owner>
+  <description>
+    User in the iOS tab grid used the Close All control while viewing the
+    regular tabs.
+  </description>
+</action>
+
+<action name="MobileTabGridEndedWithoutReordering">
+  <owner>edchin@chromium.org</owner>
+  <owner>marq@chromium.org</owner>
+  <description>
+    User in the iOS tab grid finished reordering tabs, but didn't change the tab
+    order.
+  </description>
+</action>
+
+<action name="MobileTabGridReordered">
+  <owner>edchin@chromium.org</owner>
+  <owner>marq@chromium.org</owner>
+  <description>
+    User in the iOS tab grid finished reordering tabs, and changed the tab
+    order.
+  </description>
+</action>
+
+<action name="MobileTabGridUndoCloseAllRegularTabs">
+  <owner>edchin@chromium.org</owner>
+  <owner>marq@chromium.org</owner>
+  <description>
+    User in the iOS tab grid used the Undo control after closing all regular
+    tabs.
+  </description>
+</action>
+
 <action name="MobileTabReturnedToCurrentTab">
   <owner>rlanday@chromium.org</owner>
   <description>