Fix a crash occuring during the destruction of TextInputManager on Android.

content/browser/renderer_host/render_widget_host_view_android.cc

Index: content/browser/renderer_host/render_widget_host_view_android.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_android.cc b/content/browser/renderer_host/render_widget_host_view_android.cc
index 981dc1e25c1d669152ca2d4b6cb1ba79b43a038b..70e60c498cc393e92437b5e5b3a2fa0585a0380a 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.cc
+++ b/content/browser/renderer_host/render_widget_host_view_android.cc
@@ -767,8 +767,12 @@ void RenderWidgetHostViewAndroid::OnUpdateTextInputStateCalled(
     RenderWidgetHostViewBase* updated_view,
     bool did_change_state) {
   DCHECK_EQ(text_input_manager_, text_input_manager);
+  // If there are no active widgets, the TextInputState.type should be reported
+  // as none.
   const TextInputState& state =
-      *GetTextInputManager()->GetTextInputState(updated_view);
+      GetTextInputManager()->GetActiveWidget()
+          ? *GetTextInputManager()->GetTextInputState()

[Charlie Reis, 2016/11/30 00:05:23]

I assume it's intentional to remove |updated_view|, given your comment in
TextInputManager.

However, this appears to remove the only use of the |view| parameter to
GetTextInputState, which you added in
https://codereview.chromium.org/2354793003.  Can you remove that optional
parameter as a result?  (I much prefer to avoid optional parameters when we
can-- it's very hard to reason about when looking at either the code of the
function or the call sites on their own.)

[EhsanK, 2016/11/30 00:34:25]

I believe there is no use for it. I am removing it. We can always put it back
there if there is a legitimate reason for inquiring about TextInputState for a
specific view (it might come up along the path of fixing OOPIF IME for Android).

+          : TextInputState();
   if (state.is_non_ime_change && updated_view->GetRenderWidgetHost()) {
     // Sends an acknowledgement to the renderer of a processed IME event.
     updated_view->GetRenderWidgetHost()->Send(