FWIW, the renaming tool produces auxiliary output that captures the renames:

==== BEGIN TRACKED EDITS ====
../../third_party/WebKit/Source/core/dom/ContainerNode.h:var:siblingAfterChange:sibling_after_change
../../third_party/WebKit/Source/core/dom/Document.h:var:m_xmlVersion:xml_version_
...
../../third_party/WebKit/Source/core/css/CSSPrimitiveValue.h:fun:computeLengthDouble:ComputeLengthDouble
../../third_party/WebKit/Source/core/frame/LocalFrame.h:fun:localFrameRoot:LocalFrameRoot
../../third_party/WebKit/public/platform/WebThread.h:fun:scheduler:Scheduler
==== END TRACKED EDITS ====

Hopefully this can help with the transition somehow.

It's probably also worth pointing out that some renames just change function and method names from camelCaseStyle to PascalCaseStyle, but in some cases we need to change the method name from foo to GetFoo (prepending "Get" prefix to avoid collisions with type names - for more details see the rather long story in  issue 582312 ).

We determined it would not disrupt things by talking with the crash folks.