8 files changed, 28 insertions, 0 deletions
diff --git a/app/animation_container.h b/app/animation_container.h
index 467e246..806b4e1 100644
--- a/app/animation_container.h
+++ b/app/animation_container.h
@@ -33,6 +33,9 @@ class AnimationContainer : public base::RefCounted<AnimationContainer> {
 
     // Invoked when no more animations are being managed by this container.
     virtual void AnimationContainerEmpty(AnimationContainer* container) = 0;
+
+   protected:
+    virtual ~Observer() {}
   };
 
   // Interface for the elements the AnimationContainer contains. This is
diff --git a/app/menus/simple_menu_model.h b/app/menus/simple_menu_model.h
index 2e732a9..c196225 100644
--- a/app/menus/simple_menu_model.h
+++ b/app/menus/simple_menu_model.h
@@ -43,6 +43,9 @@ class SimpleMenuModel : public MenuModel {
 
     // Performs the action associated with the specified command id.
     virtual void ExecuteCommand(int command_id) = 0;
+
+   protected:
+    virtual ~Delegate() {}
   };
 
   // The Delegate can be NULL, though if it is items can't be checked or
diff --git a/app/system_monitor.h b/app/system_monitor.h
index 6525b70..e5371ac 100644
--- a/app/system_monitor.h
+++ b/app/system_monitor.h
@@ -68,6 +68,9 @@ class SystemMonitor {
 
     // Notification that the system is resuming.
     virtual void OnResume() {}
+
+   protected:
+    virtual ~PowerObserver() {}
   };
 
   // Add a new observer.
diff --git a/base/process_util.h b/base/process_util.h
index 4cb954b..dbb0f13 100644
--- a/base/process_util.h
+++ b/base/process_util.h
@@ -254,6 +254,9 @@ class ProcessFilter {
   // Returns true to indicate set-inclusion and false otherwise.  This method
   // should not have side-effects and should be idempotent.
   virtual bool Includes(const ProcessEntry& entry) const = 0;
+
+ protected:
+  virtual ~ProcessFilter() {}
 };
 
 // Returns the number of processes on the machine that are running from the
diff --git a/ipc/ipc_fuzzing_tests.cc b/ipc/ipc_fuzzing_tests.cc
index f94e170..f9340e6 100644
--- a/ipc/ipc_fuzzing_tests.cc
+++ b/ipc/ipc_fuzzing_tests.cc
@@ -374,6 +374,8 @@ class ServerMacroExTest {
  public:
   ServerMacroExTest() : unhandled_msgs_(0) {
   }
+  virtual ~ServerMacroExTest() {
+  }
   virtual bool OnMessageReceived(const IPC::Message& msg) {
     bool msg_is_ok = false;
     IPC_BEGIN_MESSAGE_MAP_EX(ServerMacroExTest, msg, msg_is_ok)
diff --git a/media/tools/omx_test/file_sink.h b/media/tools/omx_test/file_sink.h
index fb7b732..69907031 100644
--- a/media/tools/omx_test/file_sink.h
+++ b/media/tools/omx_test/file_sink.h
@@ -31,6 +31,8 @@ class FileSink {
         csc_buf_size_(0) {
   }
 
+  virtual ~FileSink() {}
+
   virtual void BufferReady(int size, uint8* buffer);
 
   // Initialize this object. Returns true if successful.
diff --git a/views/controls/combobox/combobox.h b/views/controls/combobox/combobox.h
index 2b29f6a..0b619a2 100644
--- a/views/controls/combobox/combobox.h
+++ b/views/controls/combobox/combobox.h
@@ -28,6 +28,9 @@ class Combobox : public View {
     virtual void ItemChanged(Combobox* combo_box,
                              int prev_index,
                              int new_index) = 0;
+
+   protected:
+    virtual ~Listener() {}
   };
 
   // |model| is not owned by the combo box.
diff --git a/views/focus/focus_manager.h b/views/focus/focus_manager.h
index 73cfdc8..af6f414 100644
--- a/views/focus/focus_manager.h
+++ b/views/focus/focus_manager.h
@@ -93,6 +93,9 @@ class FocusTraversable {
   // It is used when walking up the view hierarchy tree to find which view
   // should be used as the starting view for finding the next/previous view.
   virtual View* GetFocusTraversableParentView() = 0;
+
+ protected:
+  virtual ~FocusTraversable() {}
 };
 
 // This interface should be implemented by classes that want to be notified when
@@ -100,6 +103,9 @@ class FocusTraversable {
 class FocusChangeListener {
  public:
   virtual void FocusWillChange(View* focused_before, View* focused_now) = 0;
+
+ protected:
+  virtual ~FocusChangeListener() {}
 };
 
 // This interface should be implemented by classes that want to be notified when
@@ -111,6 +117,9 @@ class WidgetFocusChangeListener {
  public:
   virtual void NativeFocusWillChange(gfx::NativeView focused_before,
                                      gfx::NativeView focused_now) = 0;
+
+ protected:
+  virtual ~WidgetFocusChangeListener() {}
 };
 
 class FocusManager {