Ensure that we set focus to the focused text input client in Windows desktop Chrome AURA when a DesktopRootWindowHostWin/

ASH root window is activated.

To achieve this we register a handler for the Activate event on the ASH core Window in Windows 8 and send an IPC 
MetroViewerHostMsg_WindowActivated  from the metro viewer process along with a bool which indcates whether we
gained or lost activation. In the RemoteRootWindowHostWin class we inform the RootWindow whether it gained or lost
focus based on the active flag passed in the IPC. 

BUG=235128
R=cpu,sky
TBR=palmer

Review URL: https://codereview.chromium.org/14070017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@196835 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 25 insertions, 0 deletions

diff --git a/win8/metro_driver/chrome_app_view_ash.cc b/win8/metro_driver/chrome_app_view_ash.cc
index b21a572..d007a86 100644
--- a/win8/metro_driver/chrome_app_view_ash.cc
+++ b/win8/metro_driver/chrome_app_view_ash.cc
@@ -50,6 +50,10 @@ typedef winfoundtn::ITypedEventHandler<
     winui::Core::CoreWindow*,
     winui::Core::VisibilityChangedEventArgs*> VisibilityChangedHandler;
 
+typedef winfoundtn::ITypedEventHandler<
+    winui::Core::CoreWindow*,
+    winui::Core::WindowActivatedEventArgs*> WindowActivatedHandler;
+
 // This function is exported by chrome.exe.
 typedef int (__cdecl *BreakpadExceptionHandler)(EXCEPTION_POINTERS* info);
 
@@ -370,6 +374,11 @@ ChromeAppViewAsh::SetWindow(winui::Core::ICoreWindow* window) {
       &visibility_changed_token_);
   CheckHR(hr);
 
+  hr = window_->add_Activated(mswr::Callback<WindowActivatedHandler>(
+      this, &ChromeAppViewAsh::OnWindowActivated).Get(),
+      &window_activated_token_);
+  CheckHR(hr);
+
   // By initializing the direct 3D swap chain with the corewindow
   // we can now directly blit to it from the browser process.
   direct3d_helper_.Initialize(window);
@@ -786,6 +795,19 @@ HRESULT ChromeAppViewAsh::OnVisibilityChanged(
   return S_OK;
 }
 
+HRESULT ChromeAppViewAsh::OnWindowActivated(
+    winui::Core::ICoreWindow* sender,
+    winui::Core::IWindowActivatedEventArgs* args) {
+  winui::Core::CoreWindowActivationState state;
+  HRESULT hr = args->get_WindowActivationState(&state);
+  if (FAILED(hr))
+    return hr;
+  DVLOG(1) << "Window activation state: "  << state;
+  ui_channel_->Send(new MetroViewerHostMsg_WindowActivated(
+      state != winui::Core::CoreWindowActivationState_Deactivated));
+  return S_OK;
+}
+
 
 ///////////////////////////////////////////////////////////////////////////////
 
diff --git a/win8/metro_driver/chrome_app_view_ash.h b/win8/metro_driver/chrome_app_view_ash.h
index e649f8d..1e9e601 100644
--- a/win8/metro_driver/chrome_app_view_ash.h
+++ b/win8/metro_driver/chrome_app_view_ash.h
@@ -107,6 +107,9 @@ class ChromeAppViewAsh
   HRESULT OnVisibilityChanged(winui::Core::ICoreWindow* sender,
                               winui::Core::IVisibilityChangedEventArgs* args);
 
+  HRESULT OnWindowActivated(winui::Core::ICoreWindow* sender,
+                            winui::Core::IWindowActivatedEventArgs* args);
+
   mswr::ComPtr<winui::Core::ICoreWindow> window_;
   mswr::ComPtr<winapp::Core::ICoreApplicationView> view_;
   EventRegistrationToken activated_token_;