Move default values to RenderWidgetHostViewEventHandler header

This makes initializer lists easier to follow. Also added some consts
where that made sense.

Bug: None
Change-Id: I86dffdbdfc4eb87df52e2eefbe9aa2a92d0f2fe6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1914607
Auto-Submit: Peter Boström <pbos@chromium.org>
Commit-Queue: Ken Buchanan <kenrb@chromium.org>
Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#715272}

content/browser/renderer_host/render_widget_host_view_event_handler.cc

@@ -104,10 +104,7 @@ bool NeedsInputGrab(content::RenderWidgetHostViewBase* view) {
 
 namespace content {
 
-RenderWidgetHostViewEventHandler::Delegate::Delegate()
-    : selection_controller_client_(nullptr),
-      selection_controller_(nullptr),
-      overscroll_controller_(nullptr) {}
+RenderWidgetHostViewEventHandler::Delegate::Delegate() = default;
 
 RenderWidgetHostViewEventHandler::Delegate::~Delegate() {}
 
@@ -115,18 +112,12 @@ RenderWidgetHostViewEventHandler::RenderWidgetHostViewEventHandler(
     RenderWidgetHostImpl* host,
     RenderWidgetHostViewBase* host_view,
     Delegate* delegate)
-    : accept_return_character_(false),
-      mouse_locked_(false),
-      pinch_zoom_enabled_(content::IsPinchToZoomEnabled()),
-      set_focus_on_mouse_down_or_key_event_(false),
+    : pinch_zoom_enabled_(content::IsPinchToZoomEnabled()),
       enable_consolidated_movement_(
           base::FeatureList::IsEnabled(features::kConsolidatedMovementXY)),
       host_(host),
       host_view_(host_view),
-      popup_child_host_view_(nullptr),
-      popup_child_event_handler_(nullptr),
       delegate_(delegate),
-      window_(nullptr),
       mouse_wheel_phase_handler_(host_view),
       debug_observer_(features::IsVizHitTestingDebugEnabled()
                           ? std::make_unique<HitTestDebugKeyEventObserver>(host)

content/browser/renderer_host/render_widget_host_view_event_handler.h

@@ -248,7 +248,7 @@ class CONTENT_EXPORT RenderWidgetHostViewEventHandler
   bool IsKeyLocked(const ui::KeyEvent& event);
 
   // Whether return characters should be passed on to the RenderWidgetHostImpl.
-  bool accept_return_character_;
+  bool accept_return_character_ = false;
 
   // Deactivates keyboard lock when destroyed.
   std::unique_ptr<aura::ScopedKeyboardHook> scoped_keyboard_hook_;
@@ -258,7 +258,7 @@ class CONTENT_EXPORT RenderWidgetHostViewEventHandler
   // mouse position just as mouse lock was entered; the movement they report
   // indicates what the change in position of the mouse would be had it not been
   // locked.
-  bool mouse_locked_;
+  bool mouse_locked_ = false;
 
   // Use to track whether pointer lock is in the unadjusted movement mode and
   // mousemoves are using unadjusted movement value (without mouse
@@ -269,11 +269,11 @@ class CONTENT_EXPORT RenderWidgetHostViewEventHandler
 
   // Whether pinch-to-zoom should be enabled and pinch events forwarded to the
   // renderer.
-  bool pinch_zoom_enabled_;
+  const bool pinch_zoom_enabled_;
 
   // This flag when set ensures that we send over a notification to blink that
-  // the current view has focus. Defaults to false.
-  bool set_focus_on_mouse_down_or_key_event_;
+  // the current view has focus.
+  bool set_focus_on_mouse_down_or_key_event_ = false;
 
   // Used to track the state of the window we're created from. Only used when
   // created fullscreen.
@@ -305,10 +305,10 @@ class CONTENT_EXPORT RenderWidgetHostViewEventHandler
   // Should create |this| and own it.
   RenderWidgetHostViewBase* const host_view_;
   // Optional, used to redirect events to a popup and associated handler.
-  RenderWidgetHostViewBase* popup_child_host_view_;
-  ui::EventHandler* popup_child_event_handler_;
+  RenderWidgetHostViewBase* popup_child_host_view_ = nullptr;
+  ui::EventHandler* popup_child_event_handler_ = nullptr;
   Delegate* const delegate_;
-  aura::Window* window_;
+  aura::Window* window_ = nullptr;
   MouseWheelPhaseHandler mouse_wheel_phase_handler_;
 
   std::unique_ptr<HitTestDebugKeyEventObserver> debug_observer_;