Platform Window: Fixing null checks.

ui/platform_window/android/platform_ime_controller_android.cc

 // Copyright 2015 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 "ui/platform_window/android/platform_ime_controller_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "jni/PlatformImeControllerAndroid_jni.h"
 
@@ skipping 10 matching lines @@
 PlatformImeControllerAndroid::~PlatformImeControllerAndroid() {
 }
 
 void PlatformImeControllerAndroid::Init(JNIEnv* env, jobject jobj) {
   DCHECK(java_platform_ime_controller_android_.is_empty());
   java_platform_ime_controller_android_ = JavaObjectWeakGlobalRef(env, jobj);
 }
 
 void PlatformImeControllerAndroid::UpdateTextInputState(
     const TextInputState& state) {
-  if (java_platform_ime_controller_android_.is_empty())
+  JNIEnv* env = base::android::AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> scoped_obj =
+      java_platform_ime_controller_android_.get(env);
+  if (scoped_obj.is_null())
     return;
-  JNIEnv* env = base::android::AttachCurrentThread();
   Java_PlatformImeControllerAndroid_updateTextInputState(
       env,
-      java_platform_ime_controller_android_.get(env).obj(),
+      scoped_obj.obj(),
       state.type,
       state.flags,
       base::android::ConvertUTF8ToJavaString(env, state.text).obj(),
       state.selection_start,
       state.selection_end,
       state.composition_start,
       state.composition_end);
 }
 
 void PlatformImeControllerAndroid::SetImeVisibility(bool visible) {
-  if (java_platform_ime_controller_android_.is_empty())
+  JNIEnv* env = base::android::AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> scoped_obj =
+      java_platform_ime_controller_android_.get(env);
+  if (scoped_obj.is_null())
     return;
-  JNIEnv* env = base::android::AttachCurrentThread();
   Java_PlatformImeControllerAndroid_setImeVisibility(
-      env,
-      java_platform_ime_controller_android_.get(env).obj(),
-      visible);
+      env, scoped_obj.obj(), visible);
 }
 
 }  // namespace ui