[weblayer] Add weblayer specific paths to path service.

This also adds the definition of the os-specific path beneath which
crash dumps should be stored.

Change-Id: I500d9e0fef2844550c62dfe6a7e71bddf786f2ab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1879261
Commit-Queue: Tobias Sargeant <tobiasjs@chromium.org>
Reviewed-by: Richard Coles <torne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#709841}

weblayer/BUILD.gn

@@ -67,6 +67,8 @@ jumbo_static_library("weblayer_lib") {
     "common/content_client_impl.h",
     "common/features.cc",
     "common/features.h",
+    "common/weblayer_paths.cc",
+    "common/weblayer_paths.h",
     "public/browser_controller.h",
     "public/browser_observer.h",
     "public/download_delegate.h",

weblayer/app/content_main_delegate_impl.cc

@@ -22,6 +22,7 @@
 #include "ui/base/ui_base_paths.h"
 #include "weblayer/browser/content_browser_client_impl.h"
 #include "weblayer/common/content_client_impl.h"
+#include "weblayer/common/weblayer_paths.h"
 #include "weblayer/utility/content_utility_client_impl.h"
 
 #if defined(OS_ANDROID)
@@ -128,6 +129,7 @@ bool ContentMainDelegateImpl::BasicStartupComplete(int* exit_code) {
 
   content_client_ = std::make_unique<ContentClientImpl>();
   SetContentClient(content_client_.get());
+  RegisterPathProvider();
 
   return false;
 }

weblayer/common/weblayer_paths.cc

+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "weblayer/common/weblayer_paths.h"
+
+#include "base/files/file_util.h"
+#include "base/path_service.h"
+#include "build/build_config.h"
+
+#if defined(OS_ANDROID)
+#include "base/android/path_utils.h"
+#include "base/base_paths_android.h"
+#endif
+
+namespace weblayer {
+
+bool PathProvider(int key, base::FilePath* result) {
+  base::FilePath cur;
+
+  switch (key) {
+#if defined(OS_ANDROID)
+    case weblayer::DIR_CRASH_DUMPS:
+      if (!base::android::GetCacheDirectory(&cur))
+        return false;
+      cur = cur.Append(FILE_PATH_LITERAL("Crashpad"));
+      if (!base::PathExists(cur))
+        base::CreateDirectory(cur);
+      *result = cur;
+      return true;
+#endif
+    default:
+      return false;
+  }
+}
+
+void RegisterPathProvider() {
+  base::PathService::RegisterProvider(PathProvider, PATH_START, PATH_END);
+}
+
+}  // namespace weblayer

weblayer/common/weblayer_paths.h

+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef WEBLAYER_COMMON_WEBLAYER_PATHS_H_
+#define WEBLAYER_COMMON_WEBLAYER_PATHS_H_
+
+#include "build/build_config.h"
+
+// This file declares path keys for weblayer.  These can be used with
+// the PathService to access various special directories and files.
+
+namespace weblayer {
+
+enum {
+  PATH_START = 1000,
+
+#if defined(OS_ANDROID)
+  DIR_CRASH_DUMPS = PATH_START,  // Directory where crash dumps are written.
+#endif
+
+  PATH_END
+};
+
+// Call once to register the provider for the path keys defined above.
+void RegisterPathProvider();
+
+}  // namespace weblayer
+
+#endif  // WEBLAYER_COMMON_WEBLAYER_PATHS_H_