#446: reduce throttle interval

docshell/base/nsDocShell.cpp

@@ -6024,6 +6024,11 @@ nsDocShell::SetIsActive(bool aIsActive)
 nsresult
 nsDocShell::SetIsActiveInternal(bool aIsActive, bool aIsHidden)
 {
+  // We disallow setting active on chrome docshells.
+  if (mItemType == nsIDocShellTreeItem::typeChrome) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
   // Keep track ourselves.
   mIsActive = aIsActive;
 

layout/base/nsRefreshDriver.cpp

@@ -426,11 +426,9 @@ private:
 
     void OnTimerStart()
     {
-#if(0)
       if (!XRE_IsParentProcess()) {
         mLastChildTick = TimeStamp::Now();
       }
-#endif
     }
 
   private:
@@ -438,7 +436,6 @@ private:
 
     void RecordTelemetryProbes(TimeStamp aVsyncTimestamp)
     {
-#if(0)
       MOZ_ASSERT(NS_IsMainThread());
     #ifndef ANDROID  /* bug 1142079 */
       if (XRE_IsParentProcess()) {
@@ -466,21 +463,20 @@ private:
         mVsyncRate = mVsyncRefreshDriverTimer->mVsyncChild->GetVsyncRate();
       }
     #endif
-#endif
     }
 
     void TickRefreshDriver(TimeStamp aVsyncTimestamp)
     {
       MOZ_ASSERT(NS_IsMainThread());
 
-      //RecordTelemetryProbes(aVsyncTimestamp);
+      RecordTelemetryProbes(aVsyncTimestamp);
-      //if (XRE_IsParentProcess()) {
+      if (XRE_IsParentProcess()) {
         MonitorAutoLock lock(mRefreshTickLock);
         aVsyncTimestamp = mRecentVsync;
         mProcessedVsync = true;
-      //} else {
+      } else {
-      //  mLastChildTick = TimeStamp::Now();
+        mLastChildTick = TimeStamp::Now();
-      //}
+      }
       MOZ_ASSERT(aVsyncTimestamp <= TimeStamp::Now());
 
       // We might have a problem that we call ~VsyncRefreshDriverTimer() before
@@ -504,10 +500,9 @@ private:
 
   virtual ~VsyncRefreshDriverTimer()
   {
-    //if (XRE_IsParentProcess()) {
+    if (XRE_IsParentProcess()) {
       mVsyncDispatcher->SetParentRefreshTimer(nullptr);
       mVsyncDispatcher = nullptr;
-#if(0)
     } else {
       // Since the PVsyncChild actors live through the life of the process, just
       // send the unobserveVsync message to disable vsync event. We don't need
@@ -517,7 +512,6 @@ private:
       mVsyncChild->SetVsyncObserver(nullptr);
       mVsyncChild = nullptr;
     }
-#endif
 
     // Detach current vsync timer from this VsyncObserver. The observer will no
     // longer tick this timer.
@@ -548,11 +542,11 @@ private:
     // Protect updates to `sActiveVsyncTimers`.
     MOZ_ASSERT(NS_IsMainThread());
 
-    //if (XRE_IsParentProcess()) {
+    if (XRE_IsParentProcess()) {
       mVsyncDispatcher->SetParentRefreshTimer(nullptr);
-    //} else {
+    } else {
-    //  Unused << mVsyncChild->SendUnobserve();
+      Unused << mVsyncChild->SendUnobserve();
-    //}
+    }
 
     MOZ_ASSERT(sActiveVsyncTimers > 0);
     --sActiveVsyncTimers;
@@ -685,8 +679,6 @@ protected:
 
   virtual void ScheduleNextTick(TimeStamp aNowTime)
   {
-    return; // speculative from bug 1352205 and TenFourFox issue 446
-
     if (mDisableAfterMilliseconds > 0.0 &&
         mNextTickDuration > mDisableAfterMilliseconds)
     {
@@ -836,14 +828,14 @@ CreateVsyncRefreshTimer()
     return;
   }
 
-  //if (XRE_IsParentProcess()) {
+  if (XRE_IsParentProcess()) {
     // Make sure all vsync systems are ready.
     gfxPlatform::GetPlatform();
     // In parent process, we don't need to use ipc. We can create the
     // VsyncRefreshDriverTimer directly.
     sRegularRateTimer = new VsyncRefreshDriverTimer();
     return;
-  //}
+  }
 
 #ifdef MOZ_NUWA_PROCESS
   // NUWA process will just use software timer. Use NuwaAddFinalConstructor()
@@ -1882,7 +1874,7 @@ nsRefreshDriver::Tick(int64_t aNowEpoch, TimeStamp aNowTime)
     }
   }
 
-#if(0)
+#ifndef ANDROID  /* bug 1142079 */
   mozilla::Telemetry::AccumulateTimeDelta(mozilla::Telemetry::REFRESH_DRIVER_TICK, mTickStart);
 #endif
 

toolkit/xre/nsEmbedFunctions.cpp

@@ -237,12 +237,6 @@ XRE_SetProcessType(const char* aProcessTypeString)
        i < (int) ArrayLength(kGeckoProcessTypeString);
        ++i) {
     if (!strcmp(kGeckoProcessTypeString[i], aProcessTypeString)) {
-      // For purposes of TenFourFox issue 441, assert that we never, ever
-      // launch a child process (it would immediately crash anyway due to
-      // defective IPC, but let's be paranoid and make it crash predictably).
-      if (MOZ_UNLIKELY(static_cast<GeckoProcessType>(i) != GeckoProcessType_Default))
-        MOZ_CRASH("TenFourFox does not support E10S child processes.");
-
       sChildProcessType = static_cast<GeckoProcessType>(i);
       return;
     }

xpfe/appshell/nsAppShellService.cpp

@@ -132,30 +132,33 @@ nsAppShellService::CreateHiddenWindowHelper(bool aIsPrivate)
   rv = NS_NewURI(getter_AddRefs(url), hiddenWindowURL);
   NS_ENSURE_SUCCESS(rv, rv);
 
-  if (aIsPrivate) {
-    chromeMask |= nsIWebBrowserChrome::CHROME_PRIVATE_WINDOW;
-  }
-
   RefPtr<nsWebShellWindow> newWindow;
-  rv = JustCreateTopWindow(nullptr, url,
+  if (!aIsPrivate) {
-                           chromeMask, initialWidth, initialHeight,
+    rv = JustCreateTopWindow(nullptr, url,
-                           true, nullptr, getter_AddRefs(newWindow));
+                             chromeMask, initialWidth, initialHeight,
-  NS_ENSURE_SUCCESS(rv, rv);
+                             true, nullptr, getter_AddRefs(newWindow));
+    NS_ENSURE_SUCCESS(rv, rv);
 
-  nsCOMPtr<nsIDocShell> docShell;
+    mHiddenWindow.swap(newWindow);
-  newWindow->GetDocShell(getter_AddRefs(docShell));
+  } else {
-  if (docShell) {
+    // Create the hidden private window
-    docShell->SetIsActive(false);
+    chromeMask |= nsIWebBrowserChrome::CHROME_PRIVATE_WINDOW;
-    if (aIsPrivate) {
+
+    rv = JustCreateTopWindow(nullptr, url,
+                             chromeMask, initialWidth, initialHeight,
+                             true, nullptr, getter_AddRefs(newWindow));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    nsCOMPtr<nsIDocShell> docShell;
+    newWindow->GetDocShell(getter_AddRefs(docShell));
+    if (docShell) {
       docShell->SetAffectPrivateSessionLifetime(false);
     }
+
+    mHiddenPrivateWindow.swap(newWindow);
   }
 
-  if (aIsPrivate) {
+  // RegisterTopLevelWindow(newWindow); -- Mac only
-    mHiddenPrivateWindow.swap(newWindow);
-  } else {
-    mHiddenWindow.swap(newWindow);
-  }
 
   return NS_OK;
 }