Rebind EGL context to flush driver caches.

gpu/command_buffer/client/gles2_implementation.cc

Index: gpu/command_buffer/client/gles2_implementation.cc
diff --git a/gpu/command_buffer/client/gles2_implementation.cc b/gpu/command_buffer/client/gles2_implementation.cc
index fbd0f182d1ae46b6a458ebbff7f2f01ca4b42bb7..2e7541ed2106716351cabc361483876a74132c62 100644
--- a/gpu/command_buffer/client/gles2_implementation.cc
+++ b/gpu/command_buffer/client/gles2_implementation.cc
@@ -327,9 +327,16 @@ void GLES2Implementation::SetAggressivelyFreeResources(
                "aggressively_free_resources", aggressively_free_resources);
   aggressively_free_resources_ = aggressively_free_resources;
 
-  // ShallowFlushCHROMIUM will free resources if |aggressively_free_resources_|
-  // is false.
-  ShallowFlushCHROMIUM();
+  if (aggressively_free_resources_) {

[piman, 2015/07/13 22:48:07]

aggressively_free_resources_ && HaveRingBuffer()

That way, we only add the commands if we need to, and otherwise avoid recreating
the command buffer just to free it.

[piman, 2015/07/13 22:48:48]

aggressively_free_resources_ && helper_->HaveRingBuffer() actually, I think.

[ericrk, 2015/07/13 23:07:52]

ah, good point

+    // Ensure that we clean up as much cache memory as possible and fully flush.
+    FlushDriverCachesCHROMIUM();
+
+    // Flush will delete transfer buffer resources if
+    // |aggressively_free_resources_| is true.
+    Flush();
+  } else {
+    ShallowFlushCHROMIUM();
+  }
 }
 
 void GLES2Implementation::WaitForCmd() {