Revert r98416 "roll clang 138187:138500"

tools/clang/scripts/update.sh

Index: tools/clang/scripts/update.sh
diff --git a/tools/clang/scripts/update.sh b/tools/clang/scripts/update.sh
index 27abeab2e10b2965ebb401a83758dfd43aeab83f..352eff173175e1307842d2e7c49b4dce3940fe17 100755
--- a/tools/clang/scripts/update.sh
+++ b/tools/clang/scripts/update.sh
@@ -34,37 +34,11 @@ fi
 # To always force a new build if someone interrupts their build half way.
 rm -f "${STAMP_FILE}"
 
-# Check if there's a prebuilt binary and if so just fetch that. That's faster,
-# and goma relies on having matching binary hashes on client and server too.
-CDS_URL=http://commondatastorage.googleapis.com/chromium-browser-clang
-CDS_FILE="clang-${CLANG_REVISION}.tgz"
-echo Trying to download prebuilt clang
-if [ "$(uname -s)" = "Linux" ]; then
-  wget "${CDS_URL}/Linux_x64/${CDS_FILE}" || rm -f "${CDS_FILE}"
-elif [ "$(uname -s)" = "Darwin" ]; then
-  curl -L --fail -O "${CDS_URL}/Mac/${CDS_FILE}" || rm -f "${CDS_FILE}"
-fi
-if [ -f "${CDS_FILE}" ]; then
-  rm -rf "${LLVM_BUILD_DIR}/Release+Asserts"
-  mkdir -p "${LLVM_BUILD_DIR}/Release+Asserts"
-  tar -xzf "${CDS_FILE}" -C "${LLVM_BUILD_DIR}/Release+Asserts"
-  echo clang "${CLANG_REVISION}" unpacked
-  echo "${CLANG_REVISION}" > "${STAMP_FILE}"
-  exit 0
-else
-  echo Did not find prebuilt clang at r"${CLANG_REVISION}", building
-fi
-
 if grep -q 'src/third_party/llvm":' "${DEPS_FILE}"; then
   echo LLVM pulled in through DEPS, skipping LLVM update step
 else
   echo Getting LLVM r"${CLANG_REVISION}" in "${LLVM_DIR}"
-  if ! svn co --force "${LLVM_REPO_URL}/llvm/trunk@${CLANG_REVISION}" \
-                      "${LLVM_DIR}"; then
-    echo Checkout failed, retrying
-    rm -rf "${LLVM_DIR}"
-    svn co --force "${LLVM_REPO_URL}/llvm/trunk@${CLANG_REVISION}" "${LLVM_DIR}"
-  fi
+  svn co --force "${LLVM_REPO_URL}/llvm/trunk@${CLANG_REVISION}" "${LLVM_DIR}"
 fi
 
 if grep -q 'src/third_party/llvm/tools/clang":' "${DEPS_FILE}"; then
@@ -85,8 +59,6 @@ cd "${LLVM_BUILD_DIR}"
 if [ ! -f ./config.status ]; then
   ../llvm/configure \
       --enable-optimized \
-      --disable-threads \
-      --disable-pthreads \
       --without-llvmgcc \
       --without-llvmgxx
 fi