text input focus: Supports Window::GetFocusedTextInputClient.

content/browser/web_contents/aura/image_window_delegate.cc

Index: content/browser/web_contents/aura/image_window_delegate.cc
diff --git a/content/browser/web_contents/aura/image_window_delegate.cc b/content/browser/web_contents/aura/image_window_delegate.cc
index 25878ea2c1c7bac602238f13a5cdd3507d1c7abb..fbc6873b49862ebf735ff26a67ff991c4363a2e4 100644
--- a/content/browser/web_contents/aura/image_window_delegate.cc
+++ b/content/browser/web_contents/aura/image_window_delegate.cc
@@ -43,6 +43,10 @@ void ImageWindowDelegate::OnBoundsChanged(const gfx::Rect& old_bounds,
     size_mismatch_ = window_size_ != image_.AsImageSkia().size();
 }
 
+ui::TextInputClient* ImageWindowDelegate::GetFocusedTextInputClient() {
+  return nullptr;
+}
+
 gfx::NativeCursor ImageWindowDelegate::GetCursor(const gfx::Point& point) {
   return gfx::kNullCursor;
 }