Revert of Speedup access to global_proxy.* attributes/accessors. (patchset #6...

Revert of Speedup access to global_proxy.* attributes/accessors. (patchset #6 id:160001 of https://codereview.chromium.org/2403003002/ )

Reason for revert:
Revert, because of crbug.com/656959.

Original issue's description:
> Speedup access to global_proxy.* attributes/accessors.
>
> Using a global proxy (e.g. 'window.f', 'w.f' or 'this.f') is considerably slower than evaluating just 'f'. This CL aims to perform the necessary checks at compile time and inline the accesses.
>
> This is a follow-on CL to crrev.com/2369933005:
> - The initial upload is crrev.com/2369933005 + a rebase.
> - The remaining issues are the fixes requested by the reviewers on that CL.
>
> BUG=chromium:634276, chromium:654716
>
> Committed: https://crrev.com/8f43d748272536117008aa6a1b53ea52126261c1
> Committed: https://crrev.com/041314524952a3c1bc71bd3beafbbb37319f1d22
> Cr-Original-Commit-Position: refs/heads/master@{#40153}
> Cr-Commit-Position: refs/heads/master@{#40365}

TBR=jochen@chromium.org,verwaest@chromium.org
NOTRY=true
NOPRESUBMIT=true
BUG=chromium:634276, chromium:654716

Review-Url: https://chromiumcodereview.appspot.com/2434233002
Cr-Commit-Position: refs/heads/master@{#40481}

src/crankshaft/hydrogen.h

@@ -2340,15 +2340,13 @@ class HOptimizedGraphBuilder : public HGraphBuilder,
 #undef DECLARE_VISIT
 
  private:
-  bool CanInlineGlobalPropertyAccess(Variable* var, LookupIterator* it,
-                                     PropertyAccessType access_type);
-
-  bool CanInlineGlobalPropertyAccess(LookupIterator* it,
-                                     PropertyAccessType access_type);
-
-  void InlineGlobalPropertyLoad(LookupIterator* it, BailoutId ast_id);
-  HInstruction* InlineGlobalPropertyStore(LookupIterator* it, HValue* value,
-                                          BailoutId ast_id);
+  // Helpers for flow graph construction.
+  enum GlobalPropertyAccess {
+    kUseCell,
+    kUseGeneric
+  };
+  GlobalPropertyAccess LookupGlobalProperty(Variable* var, LookupIterator* it,
+                                            PropertyAccessType access_type);
 
   void EnsureArgumentsArePushedForAccess();
   bool TryArgumentsAccess(Property* expr);