Add new GN junit binary template and new GYP java binary template.

testing/android/junit/java/src/org/chromium/testing/local/JunitTestMain.java

Index: testing/android/junit/java/src/org/chromium/testing/local/JunitTestMain.java
diff --git a/testing/android/junit/java/src/org/chromium/testing/local/JunitTestMain.java b/testing/android/junit/java/src/org/chromium/testing/local/JunitTestMain.java
index 3a305faff5f8dd6eb4abf8a0042acd0494b44d7c..f32579b9bfbe52a7bd31f38ddcbca3bcbcc153dc 100644
--- a/testing/android/junit/java/src/org/chromium/testing/local/JunitTestMain.java
+++ b/testing/android/junit/java/src/org/chromium/testing/local/JunitTestMain.java
@@ -9,8 +9,9 @@ import org.junit.runner.Request;
 import org.junit.runner.RunWith;
 
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.Enumeration;
-import java.util.LinkedList;
+import java.util.List;
 import java.util.jar.JarEntry;
 import java.util.jar.JarFile;
 import java.util.regex.Pattern;
@@ -32,10 +33,19 @@ public final class JunitTestMain {
     /**
      *  Finds all classes on the class path annotated with RunWith.
      */
-    public static Class[] findClassesFromClasspath() {
+    public static Class[] findClassesFromClasspath(String[] testJars) {
         String[] jarPaths = COLON.split(System.getProperty("java.class.path"));
-        LinkedList<Class> classes = new LinkedList<Class>();
-        for (String jp : jarPaths) {
+        List<String> testJarPaths = new ArrayList<String>(testJars.length);
+        for (String testJar: testJars) {

[cjhopman, 2015/04/06 18:56:32]

Do we have to do this filtering of the jars on the class path? I'd prefer if we
didn't require the --test-jars arg.

[mikecase (-- gone --), 2015/04/06 21:03:39]

With this change, System.getProperty("java.class.path") now returns all of the
jars added to the classpath by the build files, instead of just the test jar.
And when trying to load all these classes, we run into lots of errors. for
example

Exception in thread "main" java.lang.SecurityException: Prohibited package name:
java.net
	at java.lang.ClassLoader.preDefineClass(ClassLoader.java:661)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:797)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
        .


Exception in thread "main" java.lang.UnsatisfiedLinkError:
org.chromium.content.browser.DownloadController.nativeInit()V
	at org.chromium.content.browser.DownloadController.nativeInit(Native Method)
	at
org.chromium.content.browser.DownloadController.<init>(DownloadController.java:47)
	at
org.chromium.content.browser.DownloadController.<clinit>(DownloadController.java:20)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:187)
	at org.chromium.testing.local.JunitTestMain.classOrNull(JunitTestMain.java:74)
	at
org.chromium.testing.local.JunitTestMain.findClassesFromClasspath(JunitTestMain.java:59)
	at org.chromium.testing.local.JunitTestMain.main(JunitTestMain.java:93)


Exception in thread "main" java.lang.AssertionError: Couldn't create /data/anr.
	at com.android.server.am.DeviceMonitor.<clinit>(DeviceMonitor.java:82)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:187)
	at org.chromium.testing.local.JunitTestMain.classOrNull(JunitTestMain.java:78)
	at
org.chromium.testing.local.JunitTestMain.findClassesFromClasspath(JunitTestMain.java:59)
	at org.chromium.testing.local.JunitTestMain.main(JunitTestMain.java:101)


So, I could catch and ignore all the exceptions I ran into (LinkageError and
AssertionError when calling Class.forName(className) and SecurityException when
calling c.isAnnotationPresent(RunWith.class), or I could keep filtering out just
the test jar. I don't know if you would prefer one over the other.

[cjhopman, 2015/04/07 02:10:40]

I think as is is fine.

+            for (String jarPath: jarPaths) {
+                if (jarPath.endsWith(testJar)) {
+                    testJarPaths.add(jarPath);
+                    break;
+                }
+            }
+        }
+        List<Class> classes = new ArrayList<Class>();
+        for (String jp : testJarPaths) {
             try {
                 JarFile jf = new JarFile(jp);
                 for (Enumeration<JarEntry> eje = jf.entries(); eje.hasMoreElements();) {
@@ -48,7 +58,7 @@ public final class JunitTestMain {
                     cn = FORWARD_SLASH.matcher(cn).replaceAll(".");
                     Class<?> c = classOrNull(cn);
                     if (c != null && c.isAnnotationPresent(RunWith.class)) {
-                        classes.push(c);
+                        classes.add(c);
                     }
                 }
                 jf.close();
@@ -80,8 +90,9 @@ public final class JunitTestMain {
         core.addListener(new GtestListener(gtestLogger));
         JsonLogger jsonLogger = new JsonLogger(parser.getJsonOutputFile());
         core.addListener(new JsonListener(jsonLogger));
-        Class[] classes = findClassesFromClasspath();
+        Class[] classes = findClassesFromClasspath(parser.getTestJars());
         Request testRequest = Request.classes(new GtestComputer(gtestLogger), classes);
+
         for (String packageFilter : parser.getPackageFilters()) {
             testRequest = testRequest.filterWith(new PackageFilter(packageFilter));
         }