Roll Clang 214024:216630 (+216684) and switch to CMake (try 2)

tools/clang/blink_gc_plugin/CMakeLists.txt

+cmake_minimum_required(VERSION 2.8.8)
+project(BlinkGCPlugin)
+
+# This pugin is built using LLVM's build system, not Chromium's.
+# It expects LLVM_SRC_DIR and LLVM_BUILD_DIR to be set.
+# For example:
+#
+# cmake -GNinja -DLLVM_BUILD_DIR=$CHROMIUM_SRC_DIR/third_party/llvm-build \
+#               -DLLVM_SRC_DIR=$CHROMIUM_SRC_DIR/third_party/llvm \
+#               $CHROMIUM_SRC_DIR/tools/clang/blink_gc_plugin/
+# ninja
+
+list(APPEND CMAKE_MODULE_PATH "${LLVM_BUILD_DIR}/share/llvm/cmake")
+
+include(LLVMConfig)
+include(AddLLVM)
+include(HandleLLVMOptions)
+
+set(LLVM_RUNTIME_OUTPUT_INTDIR "${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/bin")
+set(LLVM_LIBRARY_OUTPUT_INTDIR "${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib")
+
+include_directories("${LLVM_SRC_DIR}/include"
+                    "${LLVM_SRC_DIR}/tools/clang/include"
+                    "${LLVM_BUILD_DIR}/include"
+                    "${LLVM_BUILD_DIR}/tools/clang/include")
+
+# This line is read by update.sh and other scripts in tools/clang/scripts
+# Note: The spaces are significant.
+set(LIBRARYNAME BlinkGCPlugin_10)
+
+add_llvm_loadable_module("lib${LIBRARYNAME}"
+                         BlinkGCPlugin.cpp
+                         Edge.cpp
+                         RecordInfo.cpp
+                        )