Changes to comments only, fixing errors and grammar.

src/compilation-cache.cc

Index: src/compilation-cache.cc
===================================================================
--- src/compilation-cache.cc	(revision 3046)
+++ src/compilation-cache.cc	(working copy)
@@ -49,14 +49,14 @@
 static const int kRegExpGenerations = 2;
 #endif
 
-// Initial of each compilation cache table allocated.
+// Initial size of each compilation cache table allocated.
 static const int kInitialCacheSize = 64;
 
 // The compilation cache consists of several generational sub-caches which uses
 // this class as a base class. A sub-cache contains a compilation cache tables
-// for each generation of the sub-cache. As the same source code string has
-// different compiled code for scripts and evals. Internally, we use separate
-// sub-caches to avoid getting the wrong kind of result when looking up.
+// for each generation of the sub-cache. Since the same source code string has
+// different compiled code for scripts and evals, we use separate sub-caches
+// for different compilation modes, to avoid retrieving the wrong result.
 class CompilationSubCache {
  public:
   explicit CompilationSubCache(int generations): generations_(generations) {