Do not calculate composition bounds until IME requests.

content/browser/renderer_host/ime_adapter_android.cc

Index: content/browser/renderer_host/ime_adapter_android.cc
diff --git a/content/browser/renderer_host/ime_adapter_android.cc b/content/browser/renderer_host/ime_adapter_android.cc
index 92b3346747006bb3ccefa7a4477b55df70496d7a..a1e2784ece090d41ad8ec58f0d8b2a2638bc5748 100644
--- a/content/browser/renderer_host/ime_adapter_android.cc
+++ b/content/browser/renderer_host/ime_adapter_android.cc
@@ -328,6 +328,16 @@ bool ImeAdapterAndroid::RequestTextInputStateUpdate(
   return true;
 }
 
+void ImeAdapterAndroid::RequestCursorUpdate(
+    JNIEnv* env, const base::android::JavaParamRef<jobject>& obj,
+    bool immediate_request, bool monitor_request) {

[nasko, 2016/07/29 16:26:10]

style: Each parameter should be on a separate line.

[Seigo Nonaka, 2016/08/01 02:27:35]

Done.

+  RenderWidgetHostImpl* rwhi = GetRenderWidgetHostImpl();
+  if (!rwhi)
+    return;
+  rwhi->Send(new InputMsg_RequestCompositionUpdate(
+      rwhi->GetRoutingID(), immediate_request, monitor_request));
+}
+
 bool ImeAdapterAndroid::IsImeThreadEnabled(
     JNIEnv* env,
     const base::android::JavaParamRef<jobject>&) {