Revert of cc: Make Overlay unit tests work when sync query extension is available.

cc/output/gl_renderer.cc

Index: cc/output/gl_renderer.cc
diff --git a/cc/output/gl_renderer.cc b/cc/output/gl_renderer.cc
index 2b298e19e258cfae0edd9ebdb3d85962a2b411e4..a302f7e783f1027647364793efbb580468b6473c 100644
--- a/cc/output/gl_renderer.cc
+++ b/cc/output/gl_renderer.cc
@@ -466,6 +466,9 @@
 }
 
 void GLRenderer::BeginDrawingFrame(DrawingFrame* frame) {
+  if (frame->device_viewport_rect.IsEmpty())
+    return;
+
   TRACE_EVENT0("cc", "GLRenderer::BeginDrawingFrame");
 
   scoped_refptr<ResourceProvider::Fence> read_lock_fence;
@@ -495,9 +498,6 @@
     read_lock_fence = make_scoped_refptr(new FallbackFence(gl_));
   }
   resource_provider_->SetReadLockFence(read_lock_fence.get());
-
-  if (frame->device_viewport_rect.IsEmpty())
-    return;
 
   // Insert WaitSyncPointCHROMIUM on quad resources prior to drawing the frame,
   // so that drawing can proceed without GL context switching interruptions.