Fix constrained window position for inactive tab

chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.mm

Index: chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.mm
diff --git a/chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.mm b/chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.mm
index 424c4930a30364555b58659938a15c9f5f25e86a..be7a7d057fc18e14aa02e8148ade5e9d0c1a8b94 100644
--- a/chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.mm
+++ b/chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.mm
@@ -182,6 +182,7 @@ NSValue* GetKeyForParentWindow(NSWindow* parent_window) {
 - (void)parentViewDidBecomeActive:(NSView*)parentView {
   [[self findSheetInfoForParentView:activeView_] hideSheet];
   activeView_.reset([parentView retain]);
+  [self updateSheetPosition:parentView];
   [[self findSheetInfoForParentView:activeView_] showSheet];
 }
 
@@ -236,15 +237,18 @@ NSValue* GetKeyForParentWindow(NSWindow* parent_window) {
 }
 
 - (void)onParentViewFrameDidChange:(NSNotification*)note {
-  [self updateSheetPosition:[note object]];
+  NSView* parentView = [note object];
+  if (![activeView_ isEqual:parentView])
+    return;
+  [self updateSheetPosition:parentView];
 }
 
 - (void)updateSheetPosition:(NSView*)parentView {
-  if (![activeView_ isEqual:parentView])
-    return;
   ConstrainedWindowSheetInfo* info =
       [self findSheetInfoForParentView:parentView];
-  DCHECK(info);
+  if (!info)
+    return;
+
   NSRect rect = [self overlayWindowFrameForParentView:parentView];
   [[info overlayWindow] setFrame:rect display:YES];
   NSPoint origin = [self originForSheetSize:[[info sheet] frame].size