cc::ResourcePool - Re-use larger resources for smaller requests

cc/base/switches.cc

Index: cc/base/switches.cc
diff --git a/cc/base/switches.cc b/cc/base/switches.cc
index 07941afdbce3dff786f415e9fc930a04c8078f8c..a8f9a7d7c196395f3954f596816e5d9233015761 100644
--- a/cc/base/switches.cc
+++ b/cc/base/switches.cc
@@ -117,5 +117,10 @@ const char kCCLayerTreeTestLongTimeout[] = "cc-layer-tree-test-long-timeout";
 // Makes pixel tests write their output instead of read it.
 const char kCCRebaselinePixeltests[] = "cc-rebaseline-pixeltests";
 
+// Disable re-use of non-exact resources to fulfill ResourcePool requests.
+// Intended only for use in layout tests to reduce noise.

[danakj, 2017/05/04 21:48:37]

it would apply to any pixel tests right? say we had UI pixel tests in the future
for instance..

[ericrk, 2017/05/05 23:18:38]

Yup, anywhere where we aren't doing fuzzy comparison (the changes are *very*
minor, so even a little bit of fuzz will allow them).

+const char kDisallowNonExactResourceReuse[] =
+    "disallow-non-exact-resource-reuse";
+
 }  // namespace switches
 }  // namespace cc