Reduce deps dependencies in content/test/fuzzer fuzz targets.

Use //content/test:test_support instead of :fuzzer_support.
This shrinks them by 22 MBs.

R=mmoroz@google.com

Change-Id: I806a28c588f742c2aaa7982e0109c0c6afec1167
Reviewed-on: https://chromium-review.googlesource.com/984153
Commit-Queue: Abhishek Arya <inferno@chromium.org>
Reviewed-by: Max Moroz <mmoroz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#546518}

content/test/fuzzer/BUILD.gn

@@ -33,7 +33,7 @@ fuzzer_test("origin_trial_token_fuzzer") {
     "origin_trial_token_fuzzer.cc",
   ]
   deps = [
-    ":fuzzer_support",
+    "//content/test:test_support",
   ]
   dict =
       "//content/test/data/fuzzer_dictionaries/origin_trial_token_fuzzer.dict"
@@ -45,8 +45,7 @@ fuzzer_test("origin_manifest_parser_fuzzer") {
     "origin_manifest_parser_fuzzer.cc",
   ]
   deps = [
-    ":fuzzer_support",
-    "//content/browser:for_content_tests",
+    "//content/test:test_support",
   ]
   dict = "//content/test/data/fuzzer_dictionaries/origin_manifest_parser_fuzzer.dict"
   seed_corpus = "//content/test/data/fuzzer_corpus/origin_manifest_parser_data/"
@@ -76,9 +75,7 @@ fuzzer_test("clear_site_data_fuzzer") {
     "clear_site_data_fuzzer.cc",
   ]
   deps = [
-    ":fuzzer_support",
-    "//base",
-    "//content/browser:for_content_tests",
+    "//content/test:test_support",
   ]
   seed_corpus = "//content/test/data/fuzzer_corpus/clear_site_data/"
 }
@@ -107,9 +104,8 @@ fuzzer_test("signed_exchange_header_fuzzer") {
     "signed_exchange_header_fuzzer.cc",
   ]
   deps = [
-    ":fuzzer_support",
     "//base:i18n",
-    "//content/browser:for_content_tests",
+    "//content/test:test_support",
   ]
   seed_corpus = "//content/test/data/htxg/"
 }
@@ -119,9 +115,8 @@ fuzzer_test("signed_exchange_header_parser_fuzzer") {
     "signed_exchange_header_parser_fuzzer.cc",
   ]
   deps = [
-    ":fuzzer_support",
     "//base:i18n",
-    "//content/browser:for_content_tests",
+    "//content/test:test_support",
   ]
   seed_corpus =
       "//content/test/data/fuzzer_corpus/signed_exchange_header_parser_data/"
@@ -132,8 +127,7 @@ fuzzer_test("signed_exchange_cert_fetcher_parser_fuzzer") {
     "signed_exchange_cert_fetcher_parser_fuzzer.cc",
   ]
   deps = [
-    ":fuzzer_support",
-    "//content/browser:for_content_tests",
+    "//content/test:test_support",
   ]
   seed_corpus = "//content/test/data/fuzzer_corpus/signed_exchange_cert_fetcher_parser_data/"
 }

content/test/fuzzer/origin_trial_token_fuzzer.cc

@@ -9,7 +9,6 @@
 
 #include "base/at_exit.h"
 #include "base/i18n/icu_util.h"
-#include "content/test/fuzzer/fuzzer_support.h"
 #include "url/gurl.h"
 
 struct TestCase {