Remove the 2-level input method system & InputMethodBridge.

ui/views/controls/prefix_selector.cc

Index: ui/views/controls/prefix_selector.cc
diff --git a/ui/views/controls/prefix_selector.cc b/ui/views/controls/prefix_selector.cc
index f7e8f66fa833828cf983972e85d568a92445b2f4..be574d0f013783fda475a2c0bc82f02a3f3092f1 100644
--- a/ui/views/controls/prefix_selector.cc
+++ b/ui/views/controls/prefix_selector.cc
@@ -5,6 +5,7 @@
 #include "ui/views/controls/prefix_selector.h"
 
 #include "base/i18n/case_conversion.h"
+#include "ui/base/ime/input_method.h"
 #include "ui/base/ime/text_input_type.h"
 #include "ui/gfx/range/range.h"
 #include "ui/views/controls/prefix_delegate.h"
@@ -31,6 +32,9 @@ PrefixSelector::PrefixSelector(PrefixDelegate* delegate)
 }
 
 PrefixSelector::~PrefixSelector() {
+  ui::InputMethod* input_method = prefix_delegate_->GetInputMethod();
+  if (input_method)
+    input_method->DetachTextInputClient(this);
 }
 
 void PrefixSelector::OnViewBlur() {
@@ -55,10 +59,6 @@ void PrefixSelector::InsertChar(base::char16 ch, int flags) {
   OnTextInput(base::string16(1, ch));
 }
 
-gfx::NativeWindow PrefixSelector::GetAttachedWindow() const {
-  return prefix_delegate_->GetWidget()->GetNativeWindow();
-}
-
 ui::TextInputType PrefixSelector::GetTextInputType() const {
   return ui::TEXT_INPUT_TYPE_TEXT;
 }