Instrument ContextCacheController::OnIdle for postmortem reports

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 fde1339e7f578cf12ab79fbbca90c78acff92b50..0ba8908fb6f8c9bf241ae42e85f6170c3a4ba724 100644
--- a/gpu/command_buffer/client/gles2_implementation.cc
+++ b/gpu/command_buffer/client/gles2_implementation.cc
@@ -20,6 +20,7 @@
 #include "base/atomic_sequence_num.h"
 #include "base/bits.h"
 #include "base/compiler_specific.h"
+#include "base/debug/activity_tracker.h"
 #include "base/numerics/safe_math.h"
 #include "base/strings/string_split.h"
 #include "base/strings/stringprintf.h"
@@ -419,6 +420,10 @@ void GLES2Implementation::SetAggressivelyFreeResources(
   aggressively_free_resources_ = aggressively_free_resources;
 
   if (aggressively_free_resources_ && helper_->HaveRingBuffer()) {
+    // TODO(manzagop): remove ScopedActivity once crbug.com/703342 is fixed.
+    base::debug::ScopedActivity activity_flush(0, 0,

[bcwhite, 2017/03/21 12:34:38]

Do you want an ID for the second parameter to distinguish all these during
analysis?  See example in activity_tracker.h, around line 1200.

[manzagop (departed), 2017/03/21 14:00:23]

Done. Here and below.

+                                               aggressively_free_resources);
+
     // Ensure that we clean up as much cache memory as possible and fully flush.
     FlushDriverCachesCHROMIUM();
 
@@ -426,6 +431,9 @@ void GLES2Implementation::SetAggressivelyFreeResources(
     // |aggressively_free_resources_| is true.
     Flush();
   } else {
+    // TODO(manzagop): remove ScopedActivity once crbug.com/703342 is fixed.
+    base::debug::ScopedActivity activity_shallow_flush(
+        0, 0, aggressively_free_resources);
     ShallowFlushCHROMIUM();
   }
 }