Do not calculate composition bounds until IME requests.

content/browser/renderer_host/ime_adapter_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/ime_adapter_android.h"
 
 #include <algorithm>
 #include <android/input.h>
 #include <vector>
 
@@ skipping 310 matching lines @@
 bool ImeAdapterAndroid::RequestTextInputStateUpdate(
     JNIEnv* env,
     const JavaParamRef<jobject>&) {
   RenderWidgetHostImpl* rwhi = GetRenderWidgetHostImpl();
   if (!rwhi)
     return false;
   rwhi->Send(new InputMsg_RequestTextInputStateUpdate(rwhi->GetRoutingID()));
   return true;
 }
 
+void ImeAdapterAndroid::RequestCursorUpdate(
+    JNIEnv* env, const base::android::JavaParamRef<jobject>& obj, int mode) {
+  RenderWidgetHostImpl* rwhi = GetRenderWidgetHostImpl();
+  if (rwhi)

[yosin_UTC9, 2016/07/06 02:02:01]

nit: better to use early return style

if (!rwhi)
  return;
rwhi->Send(...);

[Seigo Nonaka, 2016/07/06 03:25:56]

Done.

+    rwhi->Send(new InputMsg_RequestCursorUpdate(rwhi->GetRoutingID(), mode));
+}
+
 bool ImeAdapterAndroid::IsImeThreadEnabled(
     JNIEnv* env,
     const base::android::JavaParamRef<jobject>&) {
   return base::FeatureList::IsEnabled(features::kImeThread);
 }
 
 void ImeAdapterAndroid::ResetImeAdapter(JNIEnv* env,
                                         const JavaParamRef<jobject>&) {
   java_ime_adapter_.reset();
 }
@@ skipping 24 matching lines @@
 }
 
 WebContents* ImeAdapterAndroid::GetWebContents() {
   RenderWidgetHostImpl* rwh = GetRenderWidgetHostImpl();
   if (!rwh)
     return nullptr;
   return WebContents::FromRenderViewHost(RenderViewHost::From(rwh));
 }
 
 }  // namespace content