Make content shell on android support relaunching.

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

Index: content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
index dcc74ce9998f071c0df9060cc8af65b406aca1b9..5fcbf2c38d408f8f51f571fcb778dc6b7884d8f6 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
@@ -156,9 +156,10 @@ public class ContentViewCore {
      * application process in a separate thread. If the special value MAX_RENDERERS_AUTOMATIC is
      * used then the number of renderers will be determined based on the device memory class. The
      * maximum number of allowed renderers is capped by MAX_RENDERERS_LIMIT.
+     * @return Whether the process actually needed to be initialized (false if already running).
      */
-    public static void enableMultiProcess(Context context, int maxRendererProcesses) {
-        AndroidBrowserProcess.initContentViewProcess(context, maxRendererProcesses);
+    public static boolean enableMultiProcess(Context context, int maxRendererProcesses) {
+        return AndroidBrowserProcess.initContentViewProcess(context, maxRendererProcesses);
     }
 
     /**
@@ -167,10 +168,11 @@ public class ContentViewCore {
      *
      * @param context Context used to obtain the application context.
      * @param maxRendererProcesses Same as ContentView.enableMultiProcess()
+     * @return Whether the process actually needed to be initialized (false if already running).
      * @hide Only used by the platform browser.
      */
-    public static void initChromiumBrowserProcess(Context context, int maxRendererProcesses) {
-        AndroidBrowserProcess.initChromiumBrowserProcess(context, maxRendererProcesses);
+    public static boolean initChromiumBrowserProcess(Context context, int maxRendererProcesses) {
+        return AndroidBrowserProcess.initChromiumBrowserProcess(context, maxRendererProcesses);
     }
 
     /**