Move base to DEPS

base/android/java/src/org/chromium/base/TraceEvent.java

Index: base/android/java/src/org/chromium/base/TraceEvent.java
diff --git a/base/android/java/src/org/chromium/base/TraceEvent.java b/base/android/java/src/org/chromium/base/TraceEvent.java
deleted file mode 100644
index 9ace4a17de5187c6d7571f9b52cc4eb5a87756b0..0000000000000000000000000000000000000000
--- a/base/android/java/src/org/chromium/base/TraceEvent.java
+++ /dev/null
@@ -1,293 +0,0 @@
-// Copyright 2014 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.base;
-
-import android.os.Looper;
-import android.os.MessageQueue;
-import android.os.SystemClock;
-import android.util.Log;
-import android.util.Printer;
-/**
- * Java mirror of Chrome trace event API. See base/trace_event/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?).
- */
-@JNINamespace("base::android")
-public class TraceEvent {
-
-    private static volatile boolean sEnabled = false;
-    private static volatile boolean sATraceEnabled = false; // True when taking an Android systrace.
-
-    private static class BasicLooperMonitor implements Printer {
-        @Override
-        public void println(final String line) {
-            if (line.startsWith(">")) {
-                beginHandling(line);
-            } else {
-                assert line.startsWith("<");
-                endHandling(line);
-            }
-        }
-
-        void beginHandling(final String line) {
-            if (sEnabled) nativeBeginToplevel();
-        }
-
-        void endHandling(final String line) {
-            if (sEnabled) nativeEndToplevel();
-        }
-    }
-
-    /**
-     * A class that records, traces and logs statistics about the UI thead's Looper.
-     * The output of this class can be used in a number of interesting ways:
-     * <p>
-     * <ol><li>
-     * When using chrometrace, there will be a near-continuous line of
-     * measurements showing both event dispatches as well as idles;
-     * </li><li>
-     * Logging messages are output for events that run too long on the
-     * event dispatcher, making it easy to identify problematic areas;
-     * </li><li>
-     * Statistics are output whenever there is an idle after a non-trivial
-     * amount of activity, allowing information to be gathered about task
-     * density and execution cadence on the Looper;
-     * </li></ol>
-     * <p>
-     * The class attaches itself as an idle handler to the main Looper, and
-     * monitors the execution of events and idle notifications. Task counters
-     * accumulate between idle notifications and get reset when a new idle
-     * notification is received.
-     */
-    private static final class IdleTracingLooperMonitor extends BasicLooperMonitor
-            implements MessageQueue.IdleHandler {
-        // Tags for dumping to logcat or TraceEvent
-        private static final String TAG = "TraceEvent.LooperMonitor";
-        private static final String IDLE_EVENT_NAME = "Looper.queueIdle";
-
-        // Calculation constants
-        private static final long FRAME_DURATION_MILLIS = 1000L / 60L; // 60 FPS
-        // A reasonable threshold for defining a Looper event as "long running"
-        private static final long MIN_INTERESTING_DURATION_MILLIS =
-                FRAME_DURATION_MILLIS;
-        // A reasonable threshold for a "burst" of tasks on the Looper
-        private static final long MIN_INTERESTING_BURST_DURATION_MILLIS =
-                MIN_INTERESTING_DURATION_MILLIS * 3;
-
-        // Stats tracking
-        private long mLastIdleStartedAt = 0L;
-        private long mLastWorkStartedAt = 0L;
-        private int mNumTasksSeen = 0;
-        private int mNumIdlesSeen = 0;
-        private int mNumTasksSinceLastIdle = 0;
-
-        // State
-        private boolean mIdleMonitorAttached = false;
-
-        // Called from within the begin/end methods only.
-        // This method can only execute on the looper thread, because that is
-        // the only thread that is permitted to call Looper.myqueue().
-        private final void syncIdleMonitoring() {
-            if (sEnabled && !mIdleMonitorAttached) {
-                // approximate start time for computational purposes
-                mLastIdleStartedAt = SystemClock.elapsedRealtime();
-                Looper.myQueue().addIdleHandler(this);
-                mIdleMonitorAttached = true;
-                Log.v(TAG, "attached idle handler");
-            } else if (mIdleMonitorAttached && !sEnabled) {
-                Looper.myQueue().removeIdleHandler(this);
-                mIdleMonitorAttached = false;
-                Log.v(TAG, "detached idle handler");
-            }
-        }
-
-        @Override
-        final void beginHandling(final String line) {
-            // Close-out any prior 'idle' period before starting new task.
-            if (mNumTasksSinceLastIdle == 0) {
-                TraceEvent.end(IDLE_EVENT_NAME);
-            }
-            mLastWorkStartedAt = SystemClock.elapsedRealtime();
-            syncIdleMonitoring();
-            super.beginHandling(line);
-        }
-
-        @Override
-        final void endHandling(final String line) {
-            final long elapsed = SystemClock.elapsedRealtime()
-                    - mLastWorkStartedAt;
-            if (elapsed > MIN_INTERESTING_DURATION_MILLIS) {
-                traceAndLog(Log.WARN, "observed a task that took "
-                        + elapsed + "ms: " + line);
-            }
-            super.endHandling(line);
-            syncIdleMonitoring();
-            mNumTasksSeen++;
-            mNumTasksSinceLastIdle++;
-        }
-
-        private static void traceAndLog(int level, String message) {
-            TraceEvent.instant("TraceEvent.LooperMonitor:IdleStats", message);
-            Log.println(level, TAG, message);
-        }
-
-        @Override
-        public final boolean queueIdle() {
-            final long now =  SystemClock.elapsedRealtime();
-            if (mLastIdleStartedAt == 0) mLastIdleStartedAt = now;
-            final long elapsed = now - mLastIdleStartedAt;
-            mNumIdlesSeen++;
-            TraceEvent.begin(IDLE_EVENT_NAME, mNumTasksSinceLastIdle + " tasks since last idle.");
-            if (elapsed > MIN_INTERESTING_BURST_DURATION_MILLIS) {
-                // Dump stats
-                String statsString = mNumTasksSeen + " tasks and "
-                        + mNumIdlesSeen + " idles processed so far, "
-                        + mNumTasksSinceLastIdle + " tasks bursted and "
-                        + elapsed + "ms elapsed since last idle";
-                traceAndLog(Log.DEBUG, statsString);
-            }
-            mLastIdleStartedAt = now;
-            mNumTasksSinceLastIdle = 0;
-            return true; // stay installed
-        }
-    }
-
-    // Holder for monitor avoids unnecessary construction on non-debug runs
-    private static final class LooperMonitorHolder {
-        private static final BasicLooperMonitor sInstance =
-                CommandLine.getInstance().hasSwitch(BaseSwitches.ENABLE_IDLE_TRACING)
-                ? new IdleTracingLooperMonitor() : new BasicLooperMonitor();
-    }
-
-
-    /**
-     * Register an enabled observer, such that java traces are always enabled with native.
-     */
-    public static void registerNativeEnabledObserver() {
-        nativeRegisterEnabledObserver();
-    }
-
-    /**
-     * Notification from native that tracing is enabled/disabled.
-     */
-    @CalledByNative
-    public static void setEnabled(boolean enabled) {
-        sEnabled = enabled;
-        // Android M+ systrace logs this on its own. Only log it if not writing to Android systrace.
-        if (sATraceEnabled) return;
-        ThreadUtils.getUiThreadLooper().setMessageLogging(
-                enabled ? LooperMonitorHolder.sInstance : null);
-    }
-
-    /**
-     * Enables or disabled Android systrace path of Chrome tracing. If enabled, all Chrome
-     * traces will be also output to Android systrace. Because of the overhead of Android
-     * systrace, this is for WebView only.
-     */
-    public static void setATraceEnabled(boolean enabled) {
-        if (sATraceEnabled == enabled) return;
-        sATraceEnabled = enabled;
-        if (enabled) {
-            // Calls TraceEvent.setEnabled(true) via
-            // TraceLog::EnabledStateObserver::OnTraceLogEnabled
-            nativeStartATrace();
-        } else {
-            // Calls TraceEvent.setEnabled(false) via
-            // TraceLog::EnabledStateObserver::OnTraceLogDisabled
-            nativeStopATrace();
-        }
-    }
-
-    /**
-     * @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;
-    }
-
-    /**
-     * Triggers the 'instant' native trace event with no arguments.
-     * @param name The name of the event.
-     */
-    public static void instant(String name) {
-        if (sEnabled) nativeInstant(name, null);
-    }
-
-    /**
-     * Triggers the 'instant' native trace event.
-     * @param name The name of the event.
-     * @param arg  The arguments of the event.
-     */
-    public static void instant(String name, String arg) {
-        if (sEnabled) nativeInstant(name, arg);
-    }
-
-    /**
-     * Triggers the 'start' native trace event with no arguments.
-     * @param name The name of the event.
-     * @param id   The id of the asynchronous event.
-     */
-    public static void startAsync(String name, long id) {
-        if (sEnabled) nativeStartAsync(name, id);
-    }
-
-    /**
-     * Triggers the 'finish' native trace event with no arguments.
-     * @param name The name of the event.
-     * @param id   The id of the asynchronous event.
-     */
-    public static void finishAsync(String name, long id) {
-        if (sEnabled) nativeFinishAsync(name, id);
-    }
-
-    /**
-     * Triggers the 'begin' native trace event with no arguments.
-     * @param name The name of the event.
-     */
-    public static void begin(String name) {
-        if (sEnabled) nativeBegin(name, null);
-    }
-
-    /**
-     * Triggers the 'begin' native trace event.
-     * @param name The name of the event.
-     * @param arg  The arguments of the event.
-     */
-    public static void begin(String name, String arg) {
-        if (sEnabled) nativeBegin(name, arg);
-    }
-
-    /**
-     * Triggers the 'end' native trace event with no arguments.
-     * @param name The name of the event.
-     */
-    public static void end(String name) {
-        if (sEnabled) nativeEnd(name, null);
-    }
-
-    /**
-     * Triggers the 'end' native trace event.
-     * @param name The name of the event.
-     * @param arg  The arguments of the event.
-     */
-    public static void end(String name, String arg) {
-        if (sEnabled) nativeEnd(name, arg);
-    }
-
-    private static native void nativeRegisterEnabledObserver();
-    private static native void nativeStartATrace();
-    private static native void nativeStopATrace();
-    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);
-    private static native void nativeBeginToplevel();
-    private static native void nativeEndToplevel();
-    private static native void nativeStartAsync(String name, long id);
-    private static native void nativeFinishAsync(String name, long id);
-}