Bug 1362891, part 1 - Add an XRE_IsE10sParentProcess function. r=froydnj

MozReview-Commit-ID: 6neyZj71i3r

--HG--
extra : rebase_source : a172d64a03f2af8b2b1e4820645295c8d64e8118

toolkit/xre/nsAppRunner.cpp

@@ -4918,12 +4918,22 @@ XRE_IsGPUProcess()
   return XRE_GetProcessType() == GeckoProcessType_GPU;
 }
 
+/**
+ * Returns true in the e10s parent process and in the main process when e10s
+ * is disabled.
+ */
 bool
 XRE_IsParentProcess()
 {
   return XRE_GetProcessType() == GeckoProcessType_Default;
 }
 
+bool
+XRE_IsE10sParentProcess()
+{
+  return XRE_IsParentProcess() && BrowserTabsRemoteAutostart();
+}
+
 bool
 XRE_IsContentProcess()
 {

xpcom/build/nsXULAppAPI.h

@@ -442,6 +442,17 @@ XRE_API(nsresult,
 XRE_API(GeckoProcessType,
         XRE_GetProcessType, ())
 
+/**
+ * Returns true when called in the e10s parent process.  Does *NOT* return true
+ * when called in the main process if e10s is disabled.
+ */
+XRE_API(bool,
+        XRE_IsE10sParentProcess, ())
+
+/**
+ * Returns true when called in the e10s parent process or called in the main
+ * process when e10s is disabled.
+ */
 XRE_API(bool,
         XRE_IsParentProcess, ())