Replace third_party/WebKit with third_party/blink in *.md

Also, apply snake_case to file basenames.

[email protected]

Bug: 768828
Change-Id: I28bead32daf1adbf15033b778c633b034a743562
Reviewed-on: https://chromium-review.googlesource.com/1001436
Reviewed-by: Kent Tamura <[email protected]>
Commit-Queue: Kent Tamura <[email protected]>
Cr-Commit-Position: refs/heads/master@{#549110}
diff --git a/docs/memory-infra/README.md b/docs/memory-infra/README.md
index e0aa5758..84593a8 100644
--- a/docs/memory-infra/README.md
+++ b/docs/memory-infra/README.md
@@ -91,7 +91,7 @@
 
 <!-- TODO(primiano): Improve this. https://crbug.com/??? -->
 
-[oilpan]:     /third_party/WebKit/Source/platform/heap/BlinkGCDesign.md
+[oilpan]:     /third_party/blink/renderer/platform/heap/BlinkGCDesign.md
 [discardable]:base/memory/discardable_memory.h
 [cc-memory]:  probe-cc.md
 [gpu-memory]: probe-gpu.md