Update tooling to use clang-format (issue chromiumembedded#272)

.clang-format

@@ -0,0 +1,8 @@
+# Defines the Chromium style for automatic reformatting.
+# http://clang.llvm.org/docs/ClangFormatStyleOptions.html
+BasedOnStyle: Chromium
+# This defaults to 'Auto'. Explicitly set it for a while, so that
+# 'vector<vector<int> >' in existing files gets formatted to
+# 'vector<vector<int>>'. ('Auto' means that clang-format will only use
+# 'int>>' if the file already contains at least one such instance.)
+Standard: Cpp11

.gitignore

@@ -50,3 +50,8 @@ Thumbs.db
 /native/jcef_version.h
 # CEF downloads
 /third_party/cef/cef_binary_*
+# clang-format downloads
+/tools/buildtools/external_bin
+/tools/buildtools/linux64/clang-format
+/tools/buildtools/mac/clang-format
+/tools/buildtools/win/clang-format.exe

CMakeLists.txt

@@ -237,6 +237,34 @@ endif()
 # make_readme.py script.
 file(COPY "${CEF_ROOT}/README.txt" DESTINATION "${CMAKE_BINARY_DIR}")
 
+# Download clang-format from Google Storage.
+if(OS_WINDOWS)
+  set(GS_PLATFORM "win32")
+  set(GS_HASHPATH "win/clang-format.exe.sha1")
+elseif(OS_MACOSX)
+  set(GS_PLATFORM "darwin")
+  set(GS_HASHPATH "mac/clang-format.sha1")
+elseif(OS_LINUX)
+  set(GS_PLATFORM "linux*")
+  set(GS_HASHPATH "linux64/clang-format.sha1")
+endif()
+
+message(STATUS "Downloading clang-format from Google Storage...")
+execute_process(
+  COMMAND "${PYTHON_EXECUTABLE}"
+          "tools/buildtools/download_from_google_storage.py"
+          "--no_resume"
+          "--platform=${GS_PLATFORM}"
+          "--no_auth"
+          "--bucket" "chromium-clang-format"
+          "-s" "tools/buildtools/${GS_HASHPATH}"
+  WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+  RESULT_VARIABLE EXECUTE_RV
+  )
+if(NOT EXECUTE_RV STREQUAL "0")
+  message(FATAL_ERROR "Execution failed with unexpected result: ${EXECUTE_RV}")
+endif()
+
 
 #
 # Include target subdirectories.

tools/buildtools/LICENSE

@@ -0,0 +1,27 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

tools/buildtools/README.jcef

@@ -0,0 +1,13 @@
+Name: depot_tools
+Short Name: depot_tools
+URL: https://chromium.googlesource.com/chromium/tools/depot_tools.git
+Date: 24 Apr 2017
+Revision: df6e7348b
+License: BSD
+License File: LICENSE
+
+Description:
+Select tools extracted from depot_tools.
+
+Local Modifications:
+None