Move GetDocument method from WebFrame to WebLocalFrame.

content/shell/test_runner/text_input_controller.cc

Index: content/shell/test_runner/text_input_controller.cc
diff --git a/content/shell/test_runner/text_input_controller.cc b/content/shell/test_runner/text_input_controller.cc
index 672c7e41933da24d0548c0119a994a6dc9099e8d..9e7d7baad5e167005a87ca92067bd901a3c8bf88 100644
--- a/content/shell/test_runner/text_input_controller.cc
+++ b/content/shell/test_runner/text_input_controller.cc
@@ -322,6 +322,7 @@ void TextInputController::SetComposition(const std::string& text) {
 }
 
 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.";
@@ -338,6 +339,7 @@ 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.";