[Android WebView] Implement copying and uploading of Minidumps.

android_webview/java/src/org/chromium/android_webview/crash/SynchronizedWebViewCommandLine.java

Index: android_webview/java/src/org/chromium/android_webview/crash/SynchronizedWebViewCommandLine.java
diff --git a/android_webview/java/src/org/chromium/android_webview/crash/SynchronizedWebViewCommandLine.java b/android_webview/java/src/org/chromium/android_webview/crash/SynchronizedWebViewCommandLine.java
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index 0000000000000000000000000000000000000000..27331a89ab9eb92b3ea300b7a7a6f0d829377db8
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+++ b/android_webview/java/src/org/chromium/android_webview/crash/SynchronizedWebViewCommandLine.java
@@ -0,0 +1,59 @@
+// Copyright 2016 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.android_webview.crash;
+
+import org.chromium.base.CommandLine;
+import org.chromium.base.annotations.SuppressFBWarnings;
+
+/**
+ * Class for fetching command line switches for WebView in a thread-safe way.
+ */
+class SynchronizedWebViewCommandLine {
+    private static final Object sLock = new Object();
+    private static InitState sInitialized = InitState.NOT_STARTED;
+    // TODO(gsennton): this value is used in WebViewChromiumFactoryProvider as well - set it
+    // somewhere where it can be read from both classes.
+    private static final String WEBVIEW_COMMAND_LINE_FILE = "/data/local/tmp/webview-command-line";
+
+    private enum InitState { NOT_STARTED, STARTED, DONE }
+
+    /**
+     * Initialize the global CommandLine using the WebView command line file.
+     * This method includes IO operations - it shouldn't be performed on the main thread.
+     */
+    public static void initOnSeparateThread() {
+        synchronized (sLock) {
+            if (sInitialized != InitState.NOT_STARTED) return;
+            sInitialized = InitState.STARTED;
+        }
+        new Thread(new Runnable() {
+            @SuppressFBWarnings("DMI_HARDCODED_ABSOLUTE_FILENAME")
+            @Override
+            public void run() {
+                CommandLine.initFromFile(WEBVIEW_COMMAND_LINE_FILE);
+                synchronized (sLock) {
+                    sInitialized = InitState.DONE;
+                    sLock.notifyAll();
+                }
+            }
+        }, "WebView-command-line-init-thread").start();
+    }
+
+    /**
+     * Returns true if this command line contains the given switch.
+     */
+    public static boolean hasSwitch(String switchString) {
+        synchronized (sLock) {
+            while (sInitialized != InitState.DONE) {
+                try {
+                    sLock.wait();
+                } catch (InterruptedException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+            return CommandLine.getInstance().hasSwitch(switchString);
+        }
+    }
+}