Introduce ThreadedInputConnection behind a switch

content/browser/renderer_host/render_widget_host_view_android.cc

 // Copyright (c) 2012 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/browser/renderer_host/render_widget_host_view_android.h"
 
 #include <android/bitmap.h>
 #include <utility>
 
 #include "base/android/build_info.h"
@@ skipping 653 matching lines @@
   return reinterpret_cast<intptr_t>(&ime_adapter_android_);
 }
 
 void RenderWidgetHostViewAndroid::TextInputStateChanged(
     const ViewHostMsg_TextInputState_Params& params) {
   if (params.is_non_ime_change) {
     // Sends an acknowledgement to the renderer of a processed IME event.
     host_->Send(new InputMsg_ImeEventAck(host_->GetRoutingID()));
   }
 
-  if (!IsShowing())
+  if (!content_view_core_)
     return;
 
   content_view_core_->UpdateImeAdapter(
       GetNativeImeAdapter(),
       static_cast<int>(params.type), params.flags,
       params.value, params.selection_start, params.selection_end,
       params.composition_start, params.composition_end,
       params.show_ime_if_needed, params.is_non_ime_change);
 }
 
@@ skipping 87 matching lines @@
   if (gesture_provider_.OnTouchEvent(*cancel_event).succeeded) {
     bool causes_scrolling = false;
     host_->ForwardTouchEventWithLatencyInfo(
         ui::CreateWebTouchEventFromMotionEvent(*cancel_event, causes_scrolling),
         ui::LatencyInfo());
   }
 }
 
 void RenderWidgetHostViewAndroid::OnDidNavigateMainFrameToNewPage() {
   ResetGestureDetection();
+  ime_adapter_android_.Unblock();
 }
 
 void RenderWidgetHostViewAndroid::SetDoubleTapSupportEnabled(bool enabled) {
   gesture_provider_.SetDoubleTapSupportForPlatformEnabled(enabled);
 }
 
 void RenderWidgetHostViewAndroid::SetMultiTouchZoomSupportEnabled(
     bool enabled) {
   gesture_provider_.SetMultiTouchZoomSupportEnabled(enabled);
 }
@@ skipping 1271 matching lines @@
   results->orientationAngle = display.RotationAsDegree();
   results->orientationType =
       RenderWidgetHostViewBase::GetOrientationTypeForMobile(display);
   gfx::DeviceDisplayInfo info;
   results->depth = info.GetBitsPerPixel();
   results->depthPerComponent = info.GetBitsPerComponent();
   results->isMonochrome = (results->depthPerComponent == 0);
 }
 
 }  // namespace content