Move trace converter behind interface

Change-Id: I2f6d3191a3d502489f9c2e26bc6ed1d2ea7ee7d2

ui/src/core/trace_impl.ts

diff --git a/ui/src/core/trace_impl.ts b/ui/src/core/trace_impl.ts
index c0c6bb7..e6dbd34 100644
--- a/ui/src/core/trace_impl.ts
+++ b/ui/src/core/trace_impl.ts
@@ -55,7 +55,7 @@
 import {Setting, SettingDescriptor, SettingsManager} from '../public/settings';
 import {SettingsManagerImpl} from './settings_manager';
 import {MinimapManagerImpl} from './minimap_manager';
-import {TraceConverter} from '../frontend/trace_converter';
+import {TraceConverterImpl} from '../frontend/trace_converter';
 
 /**
  * Handles the per-trace state of the UI
@@ -196,7 +196,7 @@
   private readonly sidebarProxy: SidebarManagerImpl;
   private readonly pageMgrProxy: PageManagerImpl;
   private readonly settingsProxy: SettingsManagerImpl;
-  readonly traceConverter: TraceConverter;
+  readonly traceConverter: TraceConverterImpl;
 
   // This is called by TraceController when loading a new trace, soon after the
   // engine has been set up. It obtains a new TraceImpl for the core. From that
@@ -222,7 +222,7 @@
     this.traceCtx = ctx;
     const traceUnloadTrash = ctx.trash;
 
-    this.traceConverter = new TraceConverter(appImpl, this);
+    this.traceConverter = new TraceConverterImpl(appImpl, this);
 
     // Invalidate all the engine proxies when the TraceContext is destroyed.
     this.engineProxy = ctx.engine.getProxy(pluginId);

ui/src/frontend/trace_converter.ts

diff --git a/ui/src/frontend/trace_converter.ts b/ui/src/frontend/trace_converter.ts
index 27e798f..aa0553c 100644
--- a/ui/src/frontend/trace_converter.ts
+++ b/ui/src/frontend/trace_converter.ts
@@ -20,6 +20,7 @@
 import {time} from '../base/time';
 import {AppImpl} from '../core/app_impl';
 import {Trace} from '../public/trace';
+import {TraceConverter} from '../public/trace_converter';
 
 type Args =
   | UpdateStatusArgs
@@ -59,7 +60,7 @@
   size: number,
 ) => void;
 
-export class TraceConverter {
+export class TraceConverterImpl implements TraceConverter {
   constructor(
     private readonly app: AppImpl,
     private readonly trace: Trace,

ui/src/public/trace.ts

diff --git a/ui/src/public/trace.ts b/ui/src/public/trace.ts
index fdebd42..42d1a9d 100644
--- a/ui/src/public/trace.ts
+++ b/ui/src/public/trace.ts
@@ -28,7 +28,7 @@
 import {StatusbarManager} from './statusbar';
 import {MinimapManager} from './minimap';
 import {SearchManager} from './search';
-import {TraceConverter} from '../frontend/trace_converter';
+import {TraceConverter} from './trace_converter';
 
 // Lists all the possible event listeners using the key as the event name and
 // the type as the type of the callback.

ui/src/public/trace_converter.ts

diff --git a/ui/src/public/trace_converter.ts b/ui/src/public/trace_converter.ts
new file mode 100644
index 0000000..93278d1
--- /dev/null
+++ b/ui/src/public/trace_converter.ts
@@ -0,0 +1,21 @@
+// Copyright (C) 2025 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import {time} from '../base/time';
+
+export interface TraceConverter {
+  convertTraceToJsonAndDownload(): Promise<void>;
+  convertTraceToSystraceAndDownload(): Promise<void>;
+  convertTraceToPprofAndDownload(pid: number, ts: time): Promise<void>;
+}