[Docs] Move heap profiler docs into repository

components/tracing/docs/memory_infra.md

 # MemoryInfra
 
 MemoryInfra is a timeline-based profiling system integrated in chrome://tracing.
 It aims at creating Chrome-scale memory measurement tooling so that on any
 Chrome in the world --- desktop, mobile, Chrome OS or any other --- with the
 click of a button you can understand where memory is being used in your system.
 
 [TOC]
 
 ## Getting Started
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 The **tracing column in gray** reports memory that is used to collect all of the
 above information. This memory would not be used if tracing were not enabled,
 and it is discounted from malloc and the blue columns.
 
 <!-- TODO(primiano): Improve this. https://crbug.com/??? -->
 
 [oilpan]:    /third_party/WebKit/Source/platform/heap/BlinkGCDesign.md
 [cc-memory]: /cc/memory.md
 [partalloc]: /third_party/WebKit/Source/wtf/PartitionAlloc.md
 
+## Related Pages
+
+ * [Heap Profiling with MemoryInfra](heap_profiler.md)
+
 ## Rationale
 
 Another memory profiler? What is wrong with tool X?
 Most of the existing tools:
 
  * Are hard to get working with Chrome. (Massive symbols, require OS-specific
    tricks.)
  * Lack Chrome-related context.
  * Don't deal with multi-process scenarios.
 
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 Chrome-side design docs:
 
 <iframe width="100%" height="300px" src="https://docs.google.com/a/google.com/embeddedfolderview?id=0B3KuDeqD-lVJfndSa2dleUQtMnZDeWpPZk1JV0QtbVM5STkwWms4YThzQ0pGTmU1QU9kNVk">
 </iframe>
 
 Catapult-side design docs:
 
 <iframe width="100%" height="300px" src="https://docs.google.com/a/google.com/embeddedfolderview?id=0B3KuDeqD-lVJfm10bXd5YmRNWUpKOElOWS0xdU1tMmV1S3F4aHo0ZDJLTmtGRy1qVnQtVWM">
 </iframe>