[chromecast] Remove setColorInversion from window manager

We no longer want to perform this operation through the WindowManager
since that does software color conversion which causes a render pass
(leading to issues with inversion while playing video, among other
things).

Color inversion on cast display devices is now performed through
internal hardware-specific methods.

Bug: internal b/120272088
Test: manual test on device
Change-Id: I60e4b59b8fc90fc2cbfe8f847d0d99fac4606647
Reviewed-on: https://chromium-review.googlesource.com/c/1357013
Commit-Queue: Ryan Daum <rdaum@chromium.org>
Reviewed-by: Alex Sakhartchouk <alexst@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612699}

chromecast/graphics/cast_window_manager.h

@@ -70,9 +70,6 @@ class CastWindowManager {
   // Remove the registration of a system gesture events handler.
   virtual void RemoveGestureHandler(CastGestureHandler* handler) = 0;
 
-  // Enable/Disable color inversion.
-  virtual void SetColorInversion(bool enable) = 0;
-
   // Enable/disable the handling of all touch events.
   virtual void SetTouchInputDisabled(bool disabled) = 0;
 

chromecast/graphics/cast_window_manager_aura.cc

@@ -318,12 +318,6 @@ void CastWindowManagerAura::CastWindowManagerAura::RemoveGestureHandler(
   system_gesture_dispatcher_->RemoveGestureHandler(handler);
 }
 
-void CastWindowManagerAura::CastWindowManagerAura::SetColorInversion(
-    bool enable) {
-  DCHECK(window_tree_host_);
-  window_tree_host_->window()->layer()->SetLayerInverted(enable);
-}
-
 CastGestureHandler* CastWindowManagerAura::GetGestureHandler() const {
   return system_gesture_dispatcher_.get();
 }

chromecast/graphics/cast_window_manager_aura.h

@@ -71,8 +71,6 @@ class CastWindowManagerAura : public CastWindowManager,
 
   void RemoveGestureHandler(CastGestureHandler* handler) override;
 
-  void SetColorInversion(bool enable) override;
-
   CastWindowTreeHost* window_tree_host() const;
 
   CastGestureHandler* GetGestureHandler() const;

chromecast/graphics/cast_window_manager_default.cc

@@ -22,8 +22,6 @@ gfx::NativeView CastWindowManagerDefault::GetRootWindow() {
   return nullptr;
 }
 
-void CastWindowManagerDefault::SetColorInversion(bool enable) {}
-
 // Register a new handler for system gesture events.
 void CastWindowManagerDefault::AddGestureHandler(CastGestureHandler* handler) {}
 // Remove the registration of a system gesture events handler.

chromecast/graphics/cast_window_manager_default.h

@@ -28,8 +28,6 @@ class CastWindowManagerDefault : public CastWindowManager {
 
   void RemoveGestureHandler(CastGestureHandler* handler) override;
 
-  void SetColorInversion(bool enable) override;
-
   void SetTouchInputDisabled(bool disabled) override;
   void AddTouchActivityObserver(CastTouchActivityObserver* observer) override;
   void RemoveTouchActivityObserver(