Bug 780699 - Prevent possible deadlock by reducing the scope of a synchronized block in GLController. r=ajuma

mobile/android/base/gfx/GLController.java

@@ -72,11 +72,14 @@ public class GLController {
     }
 
     // This function is invoked by JNI
-    public synchronized void resumeCompositorIfValid() {
-        if (mSurfaceValid) {
-            mView.getListener().compositionResumeRequested(mWidth, mHeight);
+    public void resumeCompositorIfValid() {
+        synchronized (this) {
+            if (!mSurfaceValid) {
+                return;
             }
         }
+        mView.getListener().compositionResumeRequested(mWidth, mHeight);
+    }
 
     // Wait until we are allowed to use EGL functions on the Surface backing
     // this window. This function is invoked by JNI