Delete unused content/ dependencies in components/safe_browsing

This deletes unused content/ #includes in components/safe_browsing.

This is a small step towards refactoring this component to make it usable
in ios/, where content/ dependencies are forbidden.

Bug: 1028755
Change-Id: I0f6888872e7901f944a73ac18c89b573c87046ce
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1940953Reviewed-by: Varun Khaneja <vakh@chromium.org>
Commit-Queue: Ali Juma <ajuma@chromium.org>
Cr-Commit-Position: refs/heads/master@{#720492}

components/safe_browsing/browser/threat_details_history.cc

@@ -14,8 +14,6 @@
 #include "components/safe_browsing/browser/threat_details.h"
 #include "content/public/browser/browser_task_traits.h"
 #include "content/public/browser/browser_thread.h"
-#include "content/public/browser/notification_details.h"
-#include "content/public/browser/notification_source.h"
 
 using content::BrowserThread;
 

components/safe_browsing/db/allowlist_checker_client_unittest.cc

@@ -11,7 +11,6 @@
 #include "base/test/task_environment.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "components/safe_browsing/db/test_database_manager.h"
-#include "content/public/browser/browser_thread.h"
 #include "content/public/test/browser_task_environment.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"

components/safe_browsing/db/database_manager_unittest.cc

@@ -22,7 +22,6 @@
 #include "components/safe_browsing/db/test_database_manager.h"
 #include "components/safe_browsing/db/v4_protocol_manager_util.h"
 #include "components/safe_browsing/db/v4_test_util.h"
-#include "content/public/browser/browser_thread.h"
 #include "content/public/test/browser_task_environment.h"
 #include "crypto/sha2.h"
 #include "services/network/public/cpp/shared_url_loader_factory.h"
@@ -31,8 +30,6 @@
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
-using content::BrowserThread;
-
 namespace safe_browsing {
 
 namespace {

components/safe_browsing/db/v4_local_database_manager_unittest.cc

@@ -23,7 +23,6 @@
 #include "components/safe_browsing/db/v4_test_util.h"
 #include "components/safe_browsing/features.h"
 #include "content/public/test/browser_task_environment.h"
-#include "content/public/test/test_utils.h"
 #include "crypto/sha2.h"
 #include "services/network/public/cpp/shared_url_loader_factory.h"
 #include "services/network/public/cpp/weak_wrapper_shared_url_loader_factory.h"

components/safe_browsing/ping_manager.cc

@@ -12,7 +12,6 @@
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "components/safe_browsing/db/v4_protocol_manager_util.h"
-#include "content/public/browser/browser_thread.h"
 #include "google_apis/google_api_keys.h"
 #include "net/base/escape.h"
 #include "net/base/load_flags.h"
@@ -20,8 +19,6 @@
 #include "services/network/public/cpp/simple_url_loader.h"
 #include "url/gurl.h"
 
-using content::BrowserThread;
-
 namespace {
 
 const net::NetworkTrafficAnnotationTag kTrafficAnnotation =