Correct c/b/c/input_method/DEPS

- fix the regex that was matching against .*(...|)\.(cc|h)
(aka all *.cc, *.h).
- add a rule for dependees of tts_controller.h with commentary.

Bug: 1148093, b/173144152

Change-Id: I0e1ca36fdeec5e838fa845f6f9520d130f11a68d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2538141Reviewed-by: Darren Shen <shend@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: David Tseng <dtseng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827804}

chrome/browser/chromeos/input_method/DEPS

@@ -38,7 +38,7 @@ specific_include_rules = {
   ],
 
   # For testing.
-  ".*(_browsertest|_unittest|_test_helper|)\.(h|cc)": [
+  ".*(_browsertest|_unittest|_test_helper)\.(h|cc)": [
     "+chrome/common",
     "+chrome/browser",
     "+chrome/test",
@@ -48,4 +48,11 @@ specific_include_rules = {
   "xkeyboard_unittest\.cc": [
     "!content/public/test/test_browser_thread.h",
   ],
+
+  # TODO: This should not be an allowed dep; see
+  # http://crbug.com/1148093 and
+  # http://b/173144152.
+  "(assistive_window_controller|personal_info_suggester)\.h": [
+    "!content/public/browser/tts_controller.h",
+  ],
 }