Fix unused lambda captures in //content.

content/renderer/presentation/presentation_dispatcher_unittest.cc

Index: content/renderer/presentation/presentation_dispatcher_unittest.cc
diff --git a/content/renderer/presentation/presentation_dispatcher_unittest.cc b/content/renderer/presentation/presentation_dispatcher_unittest.cc
index 8f49caeb66cd62072e731cc1e62be6e3458ea0b4..f933fb00a0174888cce0d85114ae82ba865ea2b5 100644
--- a/content/renderer/presentation/presentation_dispatcher_unittest.cc
+++ b/content/renderer/presentation/presentation_dispatcher_unittest.cc
@@ -246,7 +246,7 @@ TEST_F(PresentationDispatcherTest, TestStartSessionError) {
   base::RunLoop run_loop;
 
   EXPECT_CALL(presentation_service_, StartSession(gurls_, _))
-      .WillOnce(Invoke([this, &error_message](
+      .WillOnce(Invoke([&error_message](
           const std::vector<GURL>& presentation_urls,
           const PresentationService::StartSessionCallback& callback) {
         PresentationErrorPtr error(PresentationError::New());