Add content_browsertests for testing cache control flags

third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp

Index: third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
diff --git a/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp b/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
index 7989e4075e9232c8b875e7a2932a71b645731d05..f65cbdef1a1c7b792238964cba956ebfc1232456 100644
--- a/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
+++ b/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
@@ -544,11 +544,6 @@ void ResourceFetcher::initializeRevalidation(const FetchRequest& request, Resour
 
     const AtomicString& lastModified = resource->response().httpHeaderField(HTTPNames::Last_Modified);
     const AtomicString& eTag = resource->response().httpHeaderField(HTTPNames::ETag);

[hiroshige, 2016/05/17 08:50:33]

How about adding a comment that says "cache-control: max-age=0" header is added
in net// layer?

-    if (!lastModified.isEmpty() || !eTag.isEmpty()) {
-        ASSERT(context().getCachePolicy() != CachePolicyReload);
-        if (context().getCachePolicy() == CachePolicyRevalidate)
-            revalidatingRequest.setHTTPHeaderField(HTTPNames::Cache_Control, "max-age=0");
-    }
     if (!lastModified.isEmpty())
         revalidatingRequest.setHTTPHeaderField(HTTPNames::If_Modified_Since, lastModified);
     if (!eTag.isEmpty())