Avoid sending notifications when the bitmap data in history has not changed

base/memory/ref_counted_memory.cc

Index: base/memory/ref_counted_memory.cc
diff --git a/base/memory/ref_counted_memory.cc b/base/memory/ref_counted_memory.cc
index 9bcde32b60ec77bb1bc88721256f59d0e3f9f67b..98dfd69eb662df41789187ad2098328c5a55d700 100644
--- a/base/memory/ref_counted_memory.cc
+++ b/base/memory/ref_counted_memory.cc
@@ -8,6 +8,12 @@
 
 namespace base {
 
+bool RefCountedMemory::Equals(const RefCountedMemory* other) const {

[jar (doing other things), 2013/01/10 07:09:06]

Why doesn't this take a const ref as an argument?

+  return other &&
+         size() == other->size() &&
+         (memcmp(front(), other->front(), size()) == 0);
+}
+
 RefCountedMemory::RefCountedMemory() {}
 
 RefCountedMemory::~RefCountedMemory() {}