Move chrome/browser/chromeos/drive/resource* (+deps) into components/drive.

Files moved from chrome/browser/chromeos/drive into components/drive:
- fake_free_disk_space_getter*
- file_cache*
- file_system_core_util*
- resource_entry_conversion*
- resource_metadata*
- resource_metadata_storage*

Other changes:
- Removed unneeded includes where needed and possible.
- Hidden usage of cryptohome::kMinFreeSpaceInBytes behind OS_CHROMEOS ifdefs
  and provided an equivalent constant shared by other OS-es.
- Hidden usage of base::SetPosixFilePermissions behind OS_CHROMEOS ifdef
  as it was only needed to support cros_disks service on ChromeOS.
- Moved 3 functions back from file_system_core_util into file_system_core.
  The 3 functions are ChromeOS-specific (dealing with where GDrive is mounted
  on ChromeOS) and moving them back helps avoid adding a new dependency on
  components/drive from chromeos directories.
- When adding a third_party/leveldatabase dependency to gyp/gn/deps files
  under components/drive, I realized that gn is not consistent with gyp, by
  not explicitly listing a dependency on third_party/cacheinvalidation in
  components/drive/BUILD.gn.

Test steps:
1. Verify that things still build via GYP (and unit tests pass).
   $ GYP_DEFINES="use_goma=1 gomadir=... chromeos=1" gclient sync
   $ ninja -C out/Debug -j 150 chrome unit_tests \
         interactive_ui_tests browser_tests drive
   $ out/Debug/unit_tests

2. Verify that things still build via GN.
    $ gn gen out/Default --args='target_os="chromeos" use_goma=true'
    $ ninja -C out/Default -j 150 chrome unit_tests \
          interactive_ui_tests browser_tests components/drive

TEST=Please see "Test steps" above.
BUG=257943, 498951
TBR=mtomasz@chromium.org, satorux@chromium.org, phajdan.jr@chromium.org, rockot@chromium.org, stevenjb@chromium.org,

Review URL: https://codereview.chromium.org/1296483003

Cr-Commit-Position: refs/heads/master@{#344637}

1 files changed, 1 insertions, 1 deletions

diff --git a/chrome/browser/chromeos/drive/write_on_cache_file.cc b/chrome/browser/chromeos/drive/write_on_cache_file.cc
index 2a15a79..bcfb30a 100644
--- a/chrome/browser/chromeos/drive/write_on_cache_file.cc
+++ b/chrome/browser/chromeos/drive/write_on_cache_file.cc
@@ -7,8 +7,8 @@
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/threading/sequenced_worker_pool.h"
-#include "chrome/browser/chromeos/drive/file_system_core_util.h"
 #include "chrome/browser/chromeos/drive/file_system_interface.h"
+#include "components/drive/file_system_core_util.h"
 #include "content/public/browser/browser_thread.h"
 
 using content::BrowserThread;