Remove the 2-level input method system & InputMethodBridge.

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index 5483d015acf38f59223043d66ba7284904ddb031..009ce15549f746c3aa636c6872e0539cb1ebeb25 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -1617,10 +1617,6 @@ void RenderWidgetHostViewAura::InsertChar(base::char16 ch, int flags) {
   }
 }
 
-gfx::NativeWindow RenderWidgetHostViewAura::GetAttachedWindow() const {
-  return window_;
-}
-
 ui::TextInputType RenderWidgetHostViewAura::GetTextInputType() const {
   return text_input_type_;
 }
@@ -1844,10 +1840,6 @@ void RenderWidgetHostViewAura::OnBoundsChanged(const gfx::Rect& old_bounds,
     GetInputMethod()->OnCaretBoundsChanged(this);
 }
 
-ui::TextInputClient* RenderWidgetHostViewAura::GetFocusedTextInputClient() {
-  return GetTextInputClient();
-}
-
 gfx::NativeCursor RenderWidgetHostViewAura::GetCursor(const gfx::Point& point) {
   if (mouse_locked_)
     return ui::kCursorNone;
@@ -2688,8 +2680,8 @@ void RenderWidgetHostViewAura::RemovingFromRootWindow() {
 
 void RenderWidgetHostViewAura::DetachFromInputMethod() {
   ui::InputMethod* input_method = GetInputMethod();
-  if (input_method && input_method->GetTextInputClient() == this)
-    input_method->SetFocusedTextInputClient(NULL);
+  if (input_method)
+    input_method->DetachTextInputClient(this);
 }
 
 void RenderWidgetHostViewAura::ForwardKeyboardEvent(