Android: cleanup jni_android to minimize external dependencies.

components/web_contents_delegate_android/web_contents_delegate_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 "components/web_contents_delegate_android/web_contents_delegate_android.h"
 
 #include <android/keycodes.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "components/web_contents_delegate_android/color_chooser_android.h"
 #include "content/public/browser/android/content_view_core.h"
 #include "content/public/browser/color_chooser.h"
 #include "content/public/browser/invalidate_type.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "content/public/browser/page_navigator.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/page_transition_types.h"
 #include "content/public/common/referrer.h"
 #include "jni/WebContentsDelegateAndroid_jni.h"
 #include "ui/base/window_open_disposition.h"
 #include "ui/gfx/rect.h"
 #include "url/gurl.h"
 
 using base::android::AttachCurrentThread;
 using base::android::ConvertUTF8ToJavaString;
 using base::android::ConvertUTF16ToJavaString;
-using base::android::HasClass;
 using base::android::ScopedJavaLocalRef;
 using content::ColorChooser;
 using content::WebContents;
 using content::WebContentsDelegate;
 
 namespace web_contents_delegate_android {
 
 WebContentsDelegateAndroid::WebContentsDelegateAndroid(JNIEnv* env, jobject obj)
     : weak_java_delegate_(env, obj) {
 }
@@ skipping 279 matching lines @@
       env, obj.obj(), scroll_point.x(), scroll_point.y());
 }
 
 // ----------------------------------------------------------------------------
 // Native JNI methods
 // ----------------------------------------------------------------------------
 
 // Register native methods
 
 bool RegisterWebContentsDelegateAndroid(JNIEnv* env) {
-  if (!HasClass(env, kWebContentsDelegateAndroidClassPath)) {
-    DLOG(ERROR) << "Unable to find class WebContentsDelegateAndroid!";
-    return false;
-  }
   return RegisterNativesImpl(env);
 }
 
 }  // namespace web_contents_delegate_android