events: Change gesture-event handler in EventHandler to not return any values.

chrome/browser/ui/views/immersive_mode_controller.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/views/immersive_mode_controller.h"
 
 #include "chrome/browser/ui/views/frame/browser_frame.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "chrome/browser/ui/views/frame/contents_container.h"
 #include "chrome/browser/ui/views/tabs/tab_strip.h"
@@ skipping 146 matching lines @@
   // to either a tab or the caption area, bypassing pre-target handlers and
   // intermediate views.
   if (enabled_)
     browser_view_->GetNativeWindow()->AddPreTargetHandler(this);
   else
     browser_view_->GetNativeWindow()->RemovePreTargetHandler(this);
 #endif  // defined(USE_AURA)
 }
 
 // ui::EventHandler overrides:
-ui::EventResult ImmersiveModeController::OnKeyEvent(ui::KeyEvent* event) {
-  return ui::ER_UNHANDLED;
-}
-
 ui::EventResult ImmersiveModeController::OnMouseEvent(ui::MouseEvent* event) {
   if (event->type() != ui::ET_MOUSE_MOVED)
     return ui::ER_UNHANDLED;
   if (event->location().y() == 0) {
     // Use a timer to detect if the cursor stays at the top past a delay.
     if (!top_timer_.IsRunning()) {
       top_timer_.Start(FROM_HERE,
                        base::TimeDelta::FromMilliseconds(kRevealDelayMs),
                        this, &ImmersiveModeController::StartReveal);
     }
   } else {
     // Cursor left the top edge.
     top_timer_.Stop();
   }
   // Pass along event for further handling.
   return ui::ER_UNHANDLED;
 }
 
-ui::EventResult ImmersiveModeController::OnScrollEvent(ui::ScrollEvent* event) {
-  return ui::ER_UNHANDLED;
-}
-
-ui::EventResult ImmersiveModeController::OnTouchEvent(ui::TouchEvent* event) {
-  return ui::ER_UNHANDLED;
-}
-
-ui::EventResult ImmersiveModeController::OnGestureEvent(
-    ui::GestureEvent* event) {
-  return ui::ER_UNHANDLED;
-}
-
 // views::MouseWatcherListener overrides:
 void ImmersiveModeController::MouseMovedOutOfHost() {
   EndReveal(true);
 }
 
 // ui::ImplicitAnimationObserver overrides:
 void ImmersiveModeController::OnImplicitAnimationsCompleted() {
   // Fired when the slide-out animation completes.
   ResetRevealView();
 }
@@ skipping 81 matching lines @@
   gfx::Transform transform;
   transform.Translate(0, -layer->bounds().height());
   layer->SetTransform(transform);
 }
 
 void ImmersiveModeController::ResetRevealView() {
   browser_view_->RemoveChildView(reveal_view_.get());
   reveal_view_.reset();
 }