Upstream some more content/ DEPS-related cleanup.

content/public/android/java/org/chromium/content/browser/TraceEvent.java

Index: content/public/android/java/org/chromium/content/browser/TraceEvent.java
diff --git a/content/public/android/java/org/chromium/content/browser/TraceEvent.java b/content/public/android/java/org/chromium/content/browser/TraceEvent.java
deleted file mode 100644
index b1ad95f0a472eae8e8e527914a8fe7d29816438e..0000000000000000000000000000000000000000
--- a/content/public/android/java/org/chromium/content/browser/TraceEvent.java
+++ /dev/null
@@ -1,143 +0,0 @@
-// 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 android.os.Looper;
-import android.util.Printer;
-
-// Java mirror of Chrome trace event API.  See
-// base/debug/trace_event.h.  Unlike the native version, Java does not
-// have stack objects, so a TRACE_EVENT() which does both
-// TRACE_EVENT_BEGIN() and TRACE_EVENT_END() in ctor/dtor is not
-// possible.
-// It is OK to use tracing before the native library has loaded, but such traces will
-// be ignored. (Perhaps we could devise to buffer them up in future?).
-public class TraceEvent {
-
-    private static boolean sEnabled = false;
-
-    private static class LooperTracePrinter implements Printer {
-        private static final String NAME = "Looper.dispatchMessage";
-        @Override
-        public void println(String line) {
-            if (line.startsWith(">>>>>")) {
-                TraceEvent.begin(NAME, line);
-            } else {
-                assert line.startsWith("<<<<<");
-                TraceEvent.end(NAME);
-            }
-        }
-    }
-
-    /**
-     * Calling this will cause enabled() to be updated to match that set on the native side.
-     * The native library must be loaded before calling this method.
-     */
-    public static void setEnabledToMatchNative() {
-        setEnabled(nativeTraceEnabled());
-    }
-
-    /**
-     * Enables or disables tracing.
-     * The native library must be loaded before the first call with enabled == true.
-     */
-    public static synchronized void setEnabled(boolean enabled) {
-        if (enabled) {
-            LibraryLoader.checkIsReady();
-        }
-        if (sEnabled == enabled) {
-            return;
-        }
-        sEnabled = enabled;
-        Looper.getMainLooper().setMessageLogging(enabled ? new LooperTracePrinter() : null);
-    }
-
-    /**
-     * @return True if tracing is enabled, false otherwise.
-     * It is safe to call trace methods without checking if TraceEvent
-     * is enabled.
-     */
-    public static boolean enabled() {
-        return sEnabled;
-    }
-
-    public static void instant(String name) {
-        if (sEnabled) {
-            nativeInstant(name, null);
-        }
-    }
-
-    public static void instant(String name, String arg) {
-        if (sEnabled) {
-            nativeInstant(name, arg);
-        }
-    }
-
-    /**
-     * Convenience wrapper around the versions of begin() that take string parameters.
-     * The name of the event will be derived from the class and function name that call this.
-     * IMPORTANT: if using this version, ensure end() (no parameters) is always called from the
-     * same calling context.
-     */
-    public static void begin() {
-        if (sEnabled) {
-            nativeBegin(getCallerName(), null);
-        }
-    }
-
-    public static void begin(String name) {
-        if (sEnabled) {
-            nativeBegin(name, null);
-        }
-    }
-
-    public static void begin(String name, String arg) {
-        if (sEnabled) {
-            nativeBegin(name, arg);
-        }
-    }
-
-    /**
-     * Convenience wrapper around the versions of end() that take string parameters. See begin()
-     * for more information.
-     */
-    public static void end() {
-        if (sEnabled) {
-            nativeEnd(getCallerName(), null);
-        }
-    }
-
-    public static void end(String name) {
-        if (sEnabled) {
-            nativeEnd(name, null);
-        }
-    }
-
-    public static void end(String name, String arg) {
-        if (sEnabled) {
-            nativeEnd(name, arg);
-        }
-    }
-
-    private static String getCallerName() {
-        // This was measured to take about 1ms on Trygon device.
-        StackTraceElement[] stack = java.lang.Thread.currentThread().getStackTrace();
-
-        // Commented out to avoid excess call overhead, but these lines can be useful to debug
-        // exactly where the TraceEvent's client is on the callstack.
-        //  int index = 0;
-        //  while (!stack[index].getClassName().equals(TraceEvent.class.getName())) ++index;
-        //  while (stack[index].getClassName().equals(TraceEvent.class.getName())) ++index;
-        //  System.logW("TraceEvent caller is at stack index " + index);
-
-        // '4' Was derived using the above commented out code snippet.
-        return stack[4].getClassName() + "." + stack[4].getMethodName();
-    }
-
-    private static native boolean nativeTraceEnabled();
-    private static native void nativeInstant(String name, String arg);
-    private static native void nativeBegin(String name, String arg);
-    private static native void nativeEnd(String name, String arg);
-}