Bug 1227706 - Implement nsWindow::GLControllerSupport; r=snorp

This patch adds native method implementations in GLControllerSupport to
manage compositor creation/pause/resume.

widget/android/AndroidBridge.cpp

@@ -685,21 +685,7 @@ AndroidBridge::GetIconForExtension(const nsACString& aFileExt, uint32_t aIconSiz
 void
 AndroidBridge::SetLayerClient(GeckoLayerClient::Param jobj)
 {
-    // if resetting is true, that means Android destroyed our GeckoApp activity
-    // and we had to recreate it, but all the Gecko-side things were not destroyed.
-    // We therefore need to link up the new java objects to Gecko, and that's what
-    // we do here.
-    bool resetting = (mLayerClient != nullptr);
-    __android_log_print(ANDROID_LOG_INFO, "GeckoBug1151102", "Reseting layer client: %d", resetting);
-
     mLayerClient = jobj;
-
-    if (resetting) {
-        // since we are re-linking the new java objects to Gecko, we need to get
-        // the viewport from the compositor (since the Java copy was thrown away)
-        // and we do that by setting the first-paint flag.
-        nsWindow::ForceIsFirstPaint();
-    }
 }
 
 void