Move LayoutTestMessageFilter-related IPCs to their own message file.

content/shell/common/layout_test/layout_test_messages.cc

Index: content/shell/common/layout_test/layout_test_messages.cc
diff --git a/components/pdf/common/pdf_message_generator.cc b/content/shell/common/layout_test/layout_test_messages.cc
similarity index 63%
copy from components/pdf/common/pdf_message_generator.cc
copy to content/shell/common/layout_test/layout_test_messages.cc
index 025d94c12f74a62db90543ad754d8749d0364ca9..afb5b261e86e13ecad191ff9ea0d43de729fe41f 100644
--- a/components/pdf/common/pdf_message_generator.cc
+++ b/content/shell/common/layout_test/layout_test_messages.cc
@@ -4,30 +4,30 @@
 
 // Get basic type definitions.
 #define IPC_MESSAGE_IMPL
-#include "components/pdf/common/pdf_message_generator.h"
+#include "content/shell/common/layout_test/layout_test_messages.h"
 
 // Generate constructors.
 #include "ipc/struct_constructor_macros.h"
-#include "components/pdf/common/pdf_message_generator.h"
+#include "content/shell/common/layout_test/layout_test_messages.h"
 
 // Generate destructors.
 #include "ipc/struct_destructor_macros.h"
-#include "components/pdf/common/pdf_message_generator.h"
+#include "content/shell/common/layout_test/layout_test_messages.h"
 
 // Generate param traits write methods.
 #include "ipc/param_traits_write_macros.h"
 namespace IPC {
-#include "components/pdf/common/pdf_message_generator.h"
+#include "content/shell/common/layout_test/layout_test_messages.h"
 }  // namespace IPC
 
 // Generate param traits read methods.
 #include "ipc/param_traits_read_macros.h"
 namespace IPC {
-#include "components/pdf/common/pdf_message_generator.h"
+#include "content/shell/common/layout_test/layout_test_messages.h"
 }  // namespace IPC
 
 // Generate param traits log methods.
 #include "ipc/param_traits_log_macros.h"
 namespace IPC {
-#include "components/pdf/common/pdf_message_generator.h"
+#include "content/shell/common/layout_test/layout_test_messages.h"
 }  // namespace IPC