Add WebAPK's tests in ChildProcessLauncherTest.

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

Index: content/public/android/java/src/org/chromium/content/browser/ChildProcessLauncher.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ChildProcessLauncher.java b/content/public/android/java/src/org/chromium/content/browser/ChildProcessLauncher.java
index c1cd1caead5bb77e75a72f4187a82b7abc23635d..761f56f769abc035075fc42aa95b455ffcdd409c 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ChildProcessLauncher.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ChildProcessLauncher.java
@@ -942,7 +942,7 @@ public class ChildProcessLauncher {
     }
 
     @VisibleForTesting
-    static ChildProcessConnection allocateBoundConnectionForTesting(Context context,
+    public static ChildProcessConnection allocateBoundConnectionForTesting(Context context,

[no sievers, 2016/06/23 17:20:15]

Can we maybe expose this through the test helper instead?
Then ChildProcessLauncher doesn't have to be in the content-api, see
crbug.com/617313.

[Xi Han, 2016/06/23 18:47:04]

We could, but we have to declare the private allocateBoundConnection() as
public. Is it ok? Same questions for other XXXForTesting()functions.

[no sievers, 2016/06/23 20:19:32]

But CPLTestHelper is in the same package.

On second thought, I don't think it matters all that much whether this is public
or not since we'd be enforcing DEPS in a different way.

But then: we should not be testing implementation details from one layer (here:
content) in a layer above (here: chrome). 

Do you think ChromeChildProcessLauncherTest.java could just merge into
ChildProcessLauncherTest.java?

The only dependency is WebApkSandboxedProcessService.class, but does that matter
much or could it just be TestDerivedSandboxedProcessService?

             ChildProcessCreationParams creationParams) {
         return allocateBoundConnection(context, null, true, false, creationParams);
     }
@@ -969,7 +969,8 @@ public class ChildProcessLauncher {
      * allocator.
      */
     @VisibleForTesting
-    static int allocatedSandboxedConnectionsCountForTesting(Context context, String packageName) {
+    public static int allocatedSandboxedConnectionsCountForTesting(Context context,
+            String packageName) {
         initConnectionAllocatorsIfNecessary(context, true, packageName);
         return sSandboxedChildConnectionAllocatorMap.get(packageName)
                 .allocatedConnectionsCountForTesting();