Sync with Chrome 39
PATCH: Add the breakpad repository as git submodule.
PATCH: Remove ios settings.
PATCH: Debug_Base -> Debug.
PATCH: crash_inspector => Inspector.
PATCH: No more dependency of gtest.
PATCH: Add the dump_syms.exe.
PATCH: Add msdia80.dll.
PATCH: Add the minidump_stackwalk.exe.
PATCH: Remove the toolsets limitation.