Fix "unused variable" warnings.

content/browser/renderer_host/text_input_client_mac_unittest.mm

 // 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.
 
 #import "content/browser/renderer_host/text_input_client_mac.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/bind.h"
@@ skipping 137 matching lines @@
 TEST_F(TextInputClientMacTest, NotFoundCharacterIndex) {
   ScopedTestingThread thread(this);
   const NSUInteger kPreviousValue = 42;
 
   // Set an arbitrary value to ensure the index is not |NSNotFound|.
   PostTask(FROM_HERE,
            base::Bind(&TextInputClientMac::SetCharacterIndexAndSignal,
                       base::Unretained(service()), kPreviousValue));
 
   scoped_refptr<TextInputClientMessageFilter> filter(
-      new TextInputClientMessageFilter(widget()->GetProcess()->GetID()));
+      new TextInputClientMessageFilter());
   std::unique_ptr<IPC::Message> message(
       new TextInputClientReplyMsg_GotCharacterIndexForPoint(
           widget()->GetRoutingID(), UINT32_MAX));
   // Set |WTF::notFound| to the index |kTaskDelayMs| after the previous
   // setting.
   PostTask(FROM_HERE,
            base::Bind(&CallOnMessageReceived, filter, *message),
            base::TimeDelta::FromMilliseconds(kTaskDelayMs) * 2);
 
   NSUInteger index = service()->GetCharacterIndexAtPoint(
@@ skipping 27 matching lines @@
 
 TEST_F(TextInputClientMacTest, TimeoutRectForRange) {
   NSRect rect = service()->GetFirstRectForRange(widget(), NSMakeRange(0, 32));
   EXPECT_EQ(1U, ipc_sink().message_count());
   EXPECT_TRUE(ipc_sink().GetUniqueMessageMatching(
       TextInputClientMsg_FirstRectForCharacterRange::ID));
   EXPECT_NSEQ(NSZeroRect, rect);
 }
 
 }  // namespace content