cast: Fix EXO build errors

https://chromium-review.googlesource.com/c/chromium/src/+/1660794
https://chromium-review.googlesource.com/c/chromium/src/+/1641133

The above 2 changes updated the WMHelper interface without updating the
Cast implementation.

Bug: None
Test: Compiled a Cast build
Change-Id: If2c5b6092a301f24197114255ba72b593ab1f5b1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1678779Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Alex Sakhartchouk <alexst@chromium.org>
Commit-Queue: Daniel Nicoara <dnicoara@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672607}

chromecast/browser/exo/wm_helper_cast_shell.cc

@@ -169,7 +169,7 @@ void WMHelperCastShell::RemovePostTargetHandler(ui::EventHandler* handler) {
   cast_window_manager_aura_->GetRootWindow()->RemovePostTargetHandler(handler);
 }
 
-bool WMHelperCastShell::IsTabletModeWindowManagerEnabled() const {
+bool WMHelperCastShell::InTabletMode() const {
   NOTIMPLEMENTED();
   return false;
 }
@@ -179,6 +179,15 @@ double WMHelperCastShell::GetDefaultDeviceScaleFactor() const {
   return 1.0;
 }
 
+void WMHelperCastShell::SetImeBlocked(aura::Window* window, bool ime_blocked) {
+  NOTIMPLEMENTED();
+}
+
+bool WMHelperCastShell::IsImeBlocked(aura::Window* window) const {
+  NOTIMPLEMENTED();
+  return false;
+}
+
 WMHelper::LifetimeManager* WMHelperCastShell::GetLifetimeManager() {
   return &lifetime_manager_;
 }

chromecast/browser/exo/wm_helper_cast_shell.h

@@ -89,8 +89,10 @@ class WMHelperCastShell : public WMHelper, public VSyncTimingManager::Delegate {
   void RemovePreTargetHandler(ui::EventHandler* handler) override;
   void AddPostTargetHandler(ui::EventHandler* handler) override;
   void RemovePostTargetHandler(ui::EventHandler* handler) override;
-  bool IsTabletModeWindowManagerEnabled() const override;
+  bool InTabletMode() const override;
   double GetDefaultDeviceScaleFactor() const override;
+  void SetImeBlocked(aura::Window* window, bool ime_blocked) override;
+  bool IsImeBlocked(aura::Window* window) const override;
 
   LifetimeManager* GetLifetimeManager() override;
   aura::client::CaptureClient* GetCaptureClient() override;