Add Panel::SetPanelBoundsInstantly for all platforms.

chrome/browser/ui/panels/panel_strip.cc

Index: chrome/browser/ui/panels/panel_strip.cc
diff --git a/chrome/browser/ui/panels/panel_strip.cc b/chrome/browser/ui/panels/panel_strip.cc
index e62e34bb5383011e9bebd6f733f7be8853f810f3..4d61150f4c42cb586c2316a8c65b72fc9b8cecea 100644
--- a/chrome/browser/ui/panels/panel_strip.cc
+++ b/chrome/browser/ui/panels/panel_strip.cc
@@ -124,7 +124,8 @@ void PanelStrip::AddExistingPanel(Panel* panel) {
   int width = restored_size.width();
   int x = GetRightMostAvailablePosition() - width;
   int y = strip_bounds_.bottom() - height;
-  panel->SetPanelBounds(gfx::Rect(x, y, width, height));
+  panel->SetPanelBounds(gfx::Rect(x, y, width, height),
+                        true);  // use animation.
 }
 
 int PanelStrip::GetMaxPanelWidth() const {
@@ -198,7 +199,7 @@ void PanelStrip::Drag(int delta_x) {
   Panel* dragging_panel = panels_[dragging_panel_index_];
   gfx::Rect new_bounds(dragging_panel->GetBounds());
   new_bounds.set_x(new_bounds.x() + delta_x);
-  dragging_panel->SetPanelBounds(new_bounds);
+  dragging_panel->SetPanelBounds(new_bounds, true);  // use animation.
 
   // Checks and processes other affected panels.
   if (delta_x > 0)
@@ -233,7 +234,7 @@ void PanelStrip::DragLeft() {
     gfx::Rect bounds(current_panel->GetBounds());
     bounds.set_x(current_panel_right_boundary - bounds.width());
     current_panel_right_boundary -= bounds.width() + kPanelsHorizontalSpacing;
-    current_panel->SetPanelBounds(bounds);
+    current_panel->SetPanelBounds(bounds, true);  // use animation.
 
     // Updates the index of current panel since it has been moved to the
     // position of previous panel.
@@ -276,7 +277,7 @@ void PanelStrip::DragRight() {
     gfx::Rect bounds(current_panel->GetBounds());
     bounds.set_x(current_panel_left_boundary);
     current_panel_left_boundary += bounds.width() + kPanelsHorizontalSpacing;
-    current_panel->SetPanelBounds(bounds);
+    current_panel->SetPanelBounds(bounds, true);  // use animation.
 
     // Updates the index of current panel since it has been moved to the
     // position of previous panel.
@@ -300,7 +301,7 @@ void PanelStrip::EndDragging(bool cancelled) {
          panels_[dragging_panel_index_]->GetBounds().x());
   } else {
     panels_[dragging_panel_index_]->SetPanelBounds(
-        dragging_panel_bounds_);
+        dragging_panel_bounds_, true);  // use animation.
   }
 
   dragging_panel_index_ = kInvalidPanelIndex;
@@ -369,7 +370,7 @@ void PanelStrip::OnPreferredWindowSizeChanged(
          --i) {
       gfx::Rect this_bounds = panels_[i]->GetBounds();
       this_bounds.set_x(this_bounds.x() + delta);
-      panels_[i]->SetPanelBounds(this_bounds);
+      panels_[i]->SetPanelBounds(this_bounds, true);  // use animation.
     }
   }
 
@@ -393,7 +394,7 @@ void PanelStrip::OnPreferredWindowSizeChanged(
   if (new_size != restored_size)
     panel->set_restored_size(new_size);
 
-  panel->SetPanelBounds(bounds);
+  panel->SetPanelBounds(bounds, true);  // use animation.
 }
 
 bool PanelStrip::ShouldBringUpTitlebars(int mouse_x, int mouse_y) const {
@@ -554,7 +555,7 @@ void PanelStrip::Rearrange(Panels::iterator iter_to_start,
     new_bounds.set_y(
         GetBottomPositionForExpansionState(panel->expansion_state()) -
             new_bounds.height());
-    panel->SetPanelBounds(new_bounds);
+    panel->SetPanelBounds(new_bounds, true);  // use animation.
 
     rightmost_position = new_bounds.x() - kPanelsHorizontalSpacing;
   }