CSS Motion Path: Support offset-rotate in addition to offset-rotation

third_party/WebKit/Source/core/frame/UseCounter.cpp

Index: third_party/WebKit/Source/core/frame/UseCounter.cpp
diff --git a/third_party/WebKit/Source/core/frame/UseCounter.cpp b/third_party/WebKit/Source/core/frame/UseCounter.cpp
index 9f7ca376e2d5a62f93cd4ced7905d285e8d683a3..2f674fe1d8b51777dd14380e8faed641b7110341 100644
--- a/third_party/WebKit/Source/core/frame/UseCounter.cpp
+++ b/third_party/WebKit/Source/core/frame/UseCounter.cpp
@@ -1050,7 +1050,9 @@ int UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(
       return 540;
     case CSSPropertyOffsetPath:
       return 541;
+    case CSSPropertyOffsetRotate:
     case CSSPropertyOffsetRotation:
+      // TODO(ericwilligers): Distinct use counter for CSSPropertyOffsetRotate.

[Rick Byers, 2016/12/06 16:30:42]

Might as well do this now, it's trivial right?  Changing the meaning of UMA data
over time makes analysis more confusing...

[Eric Willigers, 2016/12/06 18:43:12]

The intent is for this patch to be merged to M56 (design doc
https://goo.gl/XFvGR8 ).


We would need to assign use count 1692, and renumber CSSFlexibleBox ...

 
    CSSShadowPiercingDescendantCombinator = 1691,
    // The above items are available in M56 branch.

    CSSFlexibleBox = 1692,
    CSSGridLayout = 1693,


Thus I attempted to instead keep this CL as simple as possible. The design doc
proposes deprecation messages in M 57.

       return 542;
     case CSSPropertyOffset:
       return 543;