Reland: Correct c/b/c/input_method/DEPS

Fixes more DEPS violations; make sure it passes
buildtools/checkdeps/checkdeps.py chrome/browser/chromeos/input_method
which doesn't appear to be run on presubmits.

TBR=avi@chromium.org, shend@chromium.org

Original change description:
https://chromium-review.googlesource.com/c/chromium/src/+/2538141
- 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: I193b4bd9d1122223fae8fddb570dc182f0607283
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2541725Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: David Tseng <dtseng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827884}

chrome/browser/chromeos/input_method/DEPS

 include_rules = [
   "-chrome",
-  "+chrome/browser/chromeos/input_method",
+  "+chrome/browser",
+  "+chrome/common",
   "+chrome/grit",
   "-content",
 ]
@@ -38,7 +39,7 @@ specific_include_rules = {
   ],
 
   # For testing.
-  ".*(_browsertest|_unittest|_test_helper|)\.(h|cc)": [
+  ".*(_browsertest|_browsertests|_unittest|_test_helper)\.(h|cc)": [
     "+chrome/common",
     "+chrome/browser",
     "+chrome/test",
@@ -48,4 +49,16 @@ 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",
+  ],
+
+  # TODO: input method owners should audit this block.
+  "(input|ime).*\.(h|cc)": [
+    "+content/public/browser",
+  ],
 }