Merge to XFA: Change DEPS hooks paths to include 'pdfium/'.

This will break existing checkouts based on the instructions provided.

Instead of having a single pdfium directory, checkouts will now compromise of:
("repo" can be named anything)

repo/.gclient
repo/pdfium/.git
repo/pdfium/others...

To convert an existing checkout, do something like:

mkdir repo
mv pdfium repo
rm repo/pdfium/.gclient_entries # will be regenerated, with a warning
mv repo/pdfium/.gclient repo
edit repo/.gclient and change "name: '.'" to "name: 'pdfium'"

Instructions for getting a new checkout are in README.md in this CL.

R=thestig@chromium.org, tsepez@chromium.org

Review URL: https://codereview.chromium.org/1406383003 .

Review URL: https://codereview.chromium.org/1422633002 .
diff --git a/DEPS b/DEPS
index 69618a7..59335ab 100644
--- a/DEPS
+++ b/DEPS
@@ -38,7 +38,7 @@
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     'name': 'gyp',
     'pattern': '.',
-    'action': ['python', 'build/gyp_pdfium'],
+    'action': ['python', 'pdfium/build/gyp_pdfium'],
   },
   # Pull clang-format binaries using checked-in hashes.
   {
@@ -49,7 +49,7 @@
                 '--platform=win32',
                 '--no_auth',
                 '--bucket', 'chromium-clang-format',
-                '-s', 'buildtools/win/clang-format.exe.sha1',
+                '-s', 'pdfium/buildtools/win/clang-format.exe.sha1',
     ],
   },
   {
@@ -60,7 +60,7 @@
                 '--platform=darwin',
                 '--no_auth',
                 '--bucket', 'chromium-clang-format',
-                '-s', 'buildtools/mac/clang-format.sha1',
+                '-s', 'pdfium/buildtools/mac/clang-format.sha1',
     ],
   },
   {
@@ -71,7 +71,7 @@
                 '--platform=linux*',
                 '--no_auth',
                 '--bucket', 'chromium-clang-format',
-                '-s', 'buildtools/linux64/clang-format.sha1',
+                '-s', 'pdfium/buildtools/linux64/clang-format.sha1',
     ],
   },
 ]