Integrate the new input method API for Views into Chromium.

views/focus/accelerator_handler_touch.cc

Index: views/focus/accelerator_handler_touch.cc
diff --git a/views/focus/accelerator_handler_touch.cc b/views/focus/accelerator_handler_touch.cc
index ce15c518c83357f4feffdd0c88592181cb61f5df..b9120c5ca39bcb1c84965fd0f07c05da970469ca 100644
--- a/views/focus/accelerator_handler_touch.cc
+++ b/views/focus/accelerator_handler_touch.cc
@@ -15,6 +15,7 @@
 #include "views/accelerator.h"
 #include "views/events/event.h"
 #include "views/focus/focus_manager.h"
+#include "views/ime/input_method.h"
 #include "views/touchui/touch_factory.h"
 #include "views/widget/root_view.h"
 #include "views/widget/widget_gtk.h"
@@ -23,7 +24,7 @@ namespace views {
 
 namespace {
 
-RootView* FindRootViewForGdkWindow(GdkWindow* gdk_window) {
+Widget* FindWidgetForGdkWindow(GdkWindow* gdk_window) {
   gpointer data = NULL;
   gdk_window_get_user_data(gdk_window, &data);
   GtkWidget* gtk_widget = reinterpret_cast<GtkWidget*>(data);
@@ -37,7 +38,7 @@ RootView* FindRootViewForGdkWindow(GdkWindow* gdk_window) {
     DLOG(WARNING) << "no WidgetGtk found for that GtkWidget";
     return NULL;
   }
-  return widget->GetWidget()->GetRootView();
+  return widget->GetWidget();
 }
 
 #if defined(HAVE_XINPUT2)
@@ -163,12 +164,23 @@ bool DispatchXEvent(XEvent* xev) {
 
   GdkWindow* gwind = gdk_window_lookup_for_display(gdisp, xwindow);
 
-  if (RootView* root = FindRootViewForGdkWindow(gwind)) {
+  if (Widget* widget = FindWidgetForGdkWindow(gwind)) {
+    RootView* root = widget->GetRootView();
     switch (xev->type) {
       case KeyPress:
       case KeyRelease: {
         Event::FromNativeEvent2 from_native;
         KeyEvent keyev(xev, from_native);
+        InputMethod* ime = widget->GetInputMethod();
+        // Only dispatch the key event to the input method if the focused view
+        // supports text input, then we can safely return true to prevent the
+        // event from being dispatched to Gtk native widgets.
+        // TODO(suzhe): remove it after getting rid of Gtk.
+        if (ime &&
+            widget->GetFocusManager()->GetFocusedView()->GetTextInputClient()) {
+          ime->DispatchKeyEvent(keyev);
+          return true;
+        }
         return root->ProcessKeyEvent(keyev);
       }