More out-of-lining of test code, along with a bunch of GMOCK objects.

chrome/browser/profiles/profile_io_data.cc

Index: chrome/browser/profiles/profile_io_data.cc
diff --git a/chrome/browser/profiles/profile_io_data.cc b/chrome/browser/profiles/profile_io_data.cc
index 9e0e96e99aaf74b7c83c1084bf3da353cbbcc351..a2f6c5f16bf60b66021221ceb0780be075f9c97e 100644
--- a/chrome/browser/profiles/profile_io_data.cc
+++ b/chrome/browser/profiles/profile_io_data.cc
@@ -81,6 +81,16 @@ ProfileIOData::Handle::GetExtensionsRequestContextGetter() const {
   return extensions_request_context_getter_;
 }
 
+
+ProfileIOData::LazyParams::LazyParams()
+    : cache_max_size(0),
+      media_cache_max_size(0),
+      io_thread(NULL),
+      profile(NULL) {
+}
+
+ProfileIOData::LazyParams::~LazyParams() {}
+
 class ProfileIOData::RequestContext : public ChromeURLRequestContext {
  public:
   RequestContext();