Add handling for immersive fullscreen to the zoom bubble

chrome/browser/ui/views/frame/immersive_mode_controller_ash.cc

Index: chrome/browser/ui/views/frame/immersive_mode_controller_ash.cc
diff --git a/chrome/browser/ui/views/frame/immersive_mode_controller_ash.cc b/chrome/browser/ui/views/frame/immersive_mode_controller_ash.cc
index 1bb27e5a1a821e95eeaa70784076bc70fdd5a62e..51c4aa3efab9ad5ed374fc0d18adb3442be7d9be 100644
--- a/chrome/browser/ui/views/frame/immersive_mode_controller_ash.cc
+++ b/chrome/browser/ui/views/frame/immersive_mode_controller_ash.cc
@@ -288,11 +288,11 @@ ImmersiveModeControllerAsh::ImmersiveModeControllerAsh()
       revealed_lock_count_(0),
       tab_indicator_visibility_(TAB_INDICATORS_HIDE),
       mouse_x_when_hit_top_(-1),
+      gesture_begun_(false),
       native_window_(NULL),
       animation_(new ui::SlideAnimation(this)),
       animations_disabled_for_test_(false),
-      weak_ptr_factory_(this),
-      gesture_begun_(false) {
+      weak_ptr_factory_(this) {
 }
 
 ImmersiveModeControllerAsh::~ImmersiveModeControllerAsh() {
@@ -440,6 +440,14 @@ void ImmersiveModeControllerAsh::OnTopContainerBoundsChanged() {
   anchored_widget_manager_->MaybeRepositionAnchoredWidgets();
 }
 
+void ImmersiveModeControllerAsh::AddObserver(Observer* observer) {
+  observers_.AddObserver(observer);
+}
+
+void ImmersiveModeControllerAsh::RemoveObserver(Observer* observer) {
+  observers_.RemoveObserver(observer);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // Observers:
 
@@ -933,6 +941,10 @@ void ImmersiveModeControllerAsh::MaybeStartReveal(Animate animate) {
     animation_->SetSlideDuration(GetAnimationDuration(animate));
     animation_->Show();
   }
+
+  if (previous_reveal_state == CLOSED) {
+    FOR_EACH_OBSERVER(Observer, observers_, OnStartedImmersiveReveal());
+  }
 }
 
 void ImmersiveModeControllerAsh::EnablePaintToLayer(bool enable) {