Remove usage of FOR_EACH_OBSERVER macro in mash/

mash/browser/browser.cc

Index: mash/browser/browser.cc
diff --git a/mash/browser/browser.cc b/mash/browser/browser.cc
index 9df2cf6fe6d115ef25b10cb9abb98b67e26152c8..e186682145a7dd21d190ec60760a53c3e58abfde 100644
--- a/mash/browser/browser.cc
+++ b/mash/browser/browser.cc
@@ -205,7 +205,8 @@ class TabStrip : public views::View,
     AddObserver(tab);
     tabs_.push_back(tab);
     tab_container_->AddChildView(tab);
-    FOR_EACH_OBSERVER(TabStripObserver, observers_, OnTabAdded(tab));
+    for (auto& observer : observers_)
+      observer.OnTabAdded(tab);
     SelectTab(tab);
   }
 
@@ -236,7 +237,8 @@ class TabStrip : public views::View,
         SelectTab(tabs_[next_selected_index]);
     }
     Layout();
-    FOR_EACH_OBSERVER(TabStripObserver, observers_, OnTabRemoved(tab));
+    for (auto& observer : observers_)
+      observer.OnTabRemoved(tab);
     delete tab;
   }
 
@@ -246,7 +248,8 @@ class TabStrip : public views::View,
     auto it = std::find(tabs_.begin(), tabs_.end(), tab);
     DCHECK(it != tabs_.end());
     selected_index_ = it - tabs_.begin();
-    FOR_EACH_OBSERVER(TabStripObserver, observers_, OnTabSelected(tab));
+    for (auto& observer : observers_)
+      observer.OnTabSelected(tab);
   }
   Tab* selected_tab() {
     return selected_index_ != -1 ? tabs_[selected_index_] : nullptr;