Show a warning message if the cache might not be cleared between runs.

webkit/extensions/v8/benchmarking_extension.cc

Index: webkit/extensions/v8/benchmarking_extension.cc
diff --git a/webkit/extensions/v8/benchmarking_extension.cc b/webkit/extensions/v8/benchmarking_extension.cc
index 362a928e9c0dfe11d1aabbda852e264591c40643..5790ee40c5e9ebe7fb20118b855e0c7b0b36f0f7 100644
--- a/webkit/extensions/v8/benchmarking_extension.cc
+++ b/webkit/extensions/v8/benchmarking_extension.cc
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/command_line.h"
 #include "base/stats_table.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebCache.h"
 #include "webkit/extensions/v8/benchmarking_extension.h"
@@ -35,6 +36,10 @@ class BenchmarkingWrapper : public v8::Extension {
         "  native function GetCounter();"
         "  return GetCounter(name);"
         "};"
+        "chrome.benchmarking.isSingleProcess = function() {"
+        "  native function IsSingleProcess();"
+        "  return IsSingleProcess();"
+        "};"
         ) {}
 
   virtual v8::Handle<v8::FunctionTemplate> GetNativeFunction(
@@ -45,6 +50,8 @@ class BenchmarkingWrapper : public v8::Extension {
       return v8::FunctionTemplate::New(ClearCache);
     } else if (name->Equals(v8::String::New("GetCounter"))) {
       return v8::FunctionTemplate::New(GetCounter);
+    } else if (name->Equals(v8::String::New("IsSingleProcess"))) {
+      return v8::FunctionTemplate::New(IsSingleProcess);
     }
     return v8::Handle<v8::FunctionTemplate>();
   }
@@ -73,6 +80,10 @@ class BenchmarkingWrapper : public v8::Extension {
     int counter = StatsTable::current()->GetCounterValue(name);
     return v8::Integer::New(counter);
   }
+
+  static v8::Handle<v8::Value> IsSingleProcess(const v8::Arguments& args) {
+    return v8::Boolean::New(webkit_glue::IsSingleProcess());
+  }
 };
 
 v8::Extension* BenchmarkingExtension::Get() {