Fix "unused variable" warnings.

content/renderer/text_input_client_observer.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/renderer/text_input_client_observer.h"
 
 #include <stddef.h>
 
 #include <memory>
 
 #include "build/build_config.h"
 #include "content/common/text_input_client_messages.h"
 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
 #include "content/renderer/render_view_impl.h"
 #include "third_party/WebKit/public/platform/WebPoint.h"
 #include "third_party/WebKit/public/platform/WebRect.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebView.h"
 #include "third_party/WebKit/public/web/mac/WebSubstringUtil.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace content {
 
 TextInputClientObserver::TextInputClientObserver(RenderViewImpl* render_view)
-    : RenderViewObserver(render_view),
-      render_view_impl_(render_view) {
+#if defined(ENABLE_PLUGINS)
+    : RenderViewObserver(render_view), render_view_impl_(render_view) {
+#else
+    : RenderViewObserver(render_view) {
+#endif
 }
 
 TextInputClientObserver::~TextInputClientObserver() {
 }
 
 bool TextInputClientObserver::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(TextInputClientObserver, message)
     IPC_MESSAGE_HANDLER(TextInputClientMsg_StringAtPoint,
                         OnStringAtPoint)
@@ skipping 65 matching lines @@
   std::unique_ptr<const mac::AttributedStringCoder::EncodedString> encoded(
       mac::AttributedStringCoder::Encode(string));
   Send(new TextInputClientReplyMsg_GotStringForRange(routing_id(),
       *encoded.get(), baselinePoint));
 #else
   NOTIMPLEMENTED();
 #endif
 }
 
 }  // namespace content