Revert 272565 "Re-land: cc: Fail more visibly when sync queries ..."

trunk/src/cc/output/gl_renderer.cc

Index: trunk/src/cc/output/gl_renderer.cc
===================================================================
--- trunk/src/cc/output/gl_renderer.cc	(revision 272637)
+++ trunk/src/cc/output/gl_renderer.cc	(working copy)
@@ -175,10 +175,6 @@
 // determine when anti-aliasing is unnecessary.
 const float kAntiAliasingEpsilon = 1.0f / 1024.0f;
 
-// Block or crash if the number of pending sync queries reach this high as
-// something is seriously wrong on the service side if this happens.
-const size_t kMaxPendingSyncQueries = 16;
-
 }  // anonymous namespace
 
 class GLRenderer::ScopedUseGrContext {
@@ -252,11 +248,6 @@
     return !available;
   }
 
-  void Wait() {
-    unsigned result = 0;
-    gl_->GetQueryObjectuivEXT(query_id_, GL_QUERY_RESULT_EXT, &result);
-  }
-
  private:
   class Fence : public ResourceProvider::Fence {
    public:
@@ -450,15 +441,6 @@
 
   scoped_refptr<ResourceProvider::Fence> read_lock_fence;
   if (use_sync_query_) {
-    // Block until oldest sync query has passed if the number of pending queries
-    // ever reach kMaxPendingSyncQueries.
-    if (pending_sync_queries_.size() >= kMaxPendingSyncQueries) {
-      LOG(ERROR) << "Reached limit of pending sync queries.";
-
-      pending_sync_queries_.front()->Wait();
-      DCHECK(!pending_sync_queries_.front()->IsPending());
-    }
-
     while (!pending_sync_queries_.empty()) {
       if (pending_sync_queries_.front()->IsPending())
         break;