Remove tools/clang (this will break things temporarily).

tools/clang/blink_gc_plugin/CMakeLists.txt

Index: tools/clang/blink_gc_plugin/CMakeLists.txt
diff --git a/tools/clang/blink_gc_plugin/CMakeLists.txt b/tools/clang/blink_gc_plugin/CMakeLists.txt
deleted file mode 100644
index 560bd0fd751055a60dd553e1a7a94eeb719057cd..0000000000000000000000000000000000000000
--- a/tools/clang/blink_gc_plugin/CMakeLists.txt
+++ /dev/null
@@ -1,49 +0,0 @@
-set(LIBRARYNAME BlinkGCPlugin)
-
-set(plugin_sources
-  BlinkGCPlugin.cpp
-  BlinkGCPluginConsumer.cpp
-  CheckDispatchVisitor.cpp
-  CheckFieldsVisitor.cpp
-  CheckFinalizerVisitor.cpp
-  CheckGCRootsVisitor.cpp
-  CheckTraceVisitor.cpp
-  CollectVisitor.cpp
-  Config.cpp
-  Edge.cpp
-  RecordInfo.cpp)
-
-if(WIN32)
-  # Clang doesn't support loadable modules on Windows. Unfortunately, building
-  # the plugin as a static library and linking clang against it doesn't work.
-  # Since clang doesn't reference any symbols in our static library, the linker
-  # strips it out completely.
-  # Instead, we rely on the fact that the SOURCES property of a target is no
-  # 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})
-
-  cr_add_test(blink_gc_plugin_test
-    python
-    ${CMAKE_CURRENT_SOURCE_DIR}/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)
-
-  cr_add_test(blink_gc_plugin_test
-    python
-    ${CMAKE_CURRENT_SOURCE_DIR}/tests/test.py
-    ${CMAKE_BINARY_DIR}/bin/clang
-    $<TARGET_FILE:lib${LIBRARYNAME}>
-    )
-endif()