Add use-chromium-style-naming option to Blink GC plugin.

tools/clang/blink_gc_plugin/CMakeLists.txt

 set(LIBRARYNAME BlinkGCPlugin)
 
 set(plugin_sources
   BlinkGCPlugin.cpp
   BlinkGCPluginConsumer.cpp
   CheckDispatchVisitor.cpp
   CheckFieldsVisitor.cpp
   CheckFinalizerVisitor.cpp
   CheckGCRootsVisitor.cpp
   CheckTraceVisitor.cpp
@@ skipping 12 matching lines @@
   # read-only after CMake 3.1 and use it to compile the plugin directly into
   # clang...
   cmake_minimum_required(VERSION 3.1)
   # Paths must be absolute, since we're modifying a target in another directory.
   set(absolute_sources "")
   foreach(source ${plugin_sources})
     list(APPEND absolute_sources ${CMAKE_CURRENT_SOURCE_DIR}/${source})
   endforeach()
   set_property(TARGET clang APPEND PROPERTY SOURCES ${absolute_sources})
 
+  # TODO(https://crbug.com/675879): Clean up after the Blink rename.
+  cr_add_test(blink_gc_plugin_legacy_test
+    python tests/legacy_naming/test.py
+    ${CMAKE_BINARY_DIR}/bin/clang
+    )
   cr_add_test(blink_gc_plugin_test
     python tests/test.py
     ${CMAKE_BINARY_DIR}/bin/clang
     )
 else()
   add_llvm_loadable_module("lib${LIBRARYNAME}" ${plugin_sources})
   add_dependencies("lib${LIBRARYNAME}" clang)
 
   cr_install(TARGETS "lib${LIBRARYNAME}" LIBRARY DESTINATION lib)
 
+  # TODO(https://crbug.com/675879): Clean up after the Blink rename.
+  cr_add_test(blink_gc_plugin_legacy_test
+    python tests/legacy_naming/test.py
+    ${CMAKE_BINARY_DIR}/bin/clang
+    $<TARGET_FILE:lib${LIBRARYNAME}>
+    )
   cr_add_test(blink_gc_plugin_test
     python tests/test.py
     ${CMAKE_BINARY_DIR}/bin/clang
     $<TARGET_FILE:lib${LIBRARYNAME}>
     )
 endif()