Move GetDocument method from WebFrame to WebLocalFrame.

content/shell/test_runner/text_input_controller.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/shell/test_runner/text_input_controller.h"
 
 #include "base/macros.h"
 #include "content/shell/test_runner/web_test_delegate.h"
 #include "content/shell/test_runner/web_view_test_proxy.h"
 #include "gin/arguments.h"
@@ skipping 304 matching lines @@
   underlines.push_back(blink::WebCompositionUnderline(
       0, textLength, SK_ColorBLACK, false, SK_ColorTRANSPARENT));
   if (auto* controller = GetInputMethodController()) {
     controller->SetComposition(
         newText, blink::WebVector<blink::WebCompositionUnderline>(underlines),
         blink::WebRange(), textLength, textLength);
   }
 }
 
 void TextInputController::ForceTextInputStateUpdate() {
+  // TODO(lukasza): Finish adding OOPIF support to the layout tests harness.
   CHECK(view()->MainFrame()->IsWebLocalFrame())
       << "WebView does not have a local main frame and"
          " cannot handle input method controller tasks.";
   web_view_test_proxy_base_->delegate()->ForceTextInputStateUpdate(
       view()->MainFrame()->ToWebLocalFrame());
 }
 
 blink::WebView* TextInputController::view() {
   return web_view_test_proxy_base_->web_view();
 }
 
 blink::WebInputMethodController*
 TextInputController::GetInputMethodController() {
   if (!view()->MainFrame())
     return nullptr;
 
+  // TODO(lukasza): Finish adding OOPIF support to the layout tests harness.
   CHECK(view()->MainFrame()->IsWebLocalFrame())
       << "WebView does not have a local main frame and"
          " cannot handle input method controller tasks.";
 
   return view()
       ->MainFrame()
       ->ToWebLocalFrame()
       ->FrameWidget()
       ->GetActiveWebInputMethodController();
 }
 
 }  // namespace test_runner