Enable Tracing on content shell for Android

content/public/android/java/src/org/chromium/content/browser/TraceController.java

+// Copyright (c) 2012 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.
+
+package org.chromium.content.browser;
+
+import org.chromium.base.JNINamespace;
+
+@JNINamespace("content")

[Ted C, 2013/01/04 17:40:48]

Convention is to put the annotations below the javadoc right above the
declaration.

+/**
+ * Handler for tracing related intent.
+ */
+public class TraceController {

[Ted C, 2013/01/04 17:40:48]

I would rename this to TracingIntentHandler as well to match the native side of
things.

+
+    /**
+     * Begin recording trace events.
+     *
+     * @param path Specifies where the trace data will be saved when tracing is stopped.
+     */
+    public static void beginTracing(String path) {
+        nativeBeginTracing(path);
+    }
+
+    /**
+     * Stop recording trace events, and dump the data to the file
+     */
+    public static void endTracing() {
+        nativeEndTracing();
+    }
+
+    private static native void nativeBeginTracing(String path);
+    private static native void nativeEndTracing();
+}