Minor changes to allow Pepper InstancePrivate tests to pass with gin

This includes some minor changes which allow tests to when NPObject is replaced
by gin in pepper:
-Add shared library exports for use of PepperTryCatch and ScopedPPVarArray in
tests.
-Add gin as a dependency to content_unittests for use in host_var_tracker_unittest
-Change TestInstanceDeprecated so that it doesn't execute a script from the
ScriptableObject upon destruction. The reason for this is that the garbage
collector is manually run from the destructor of the plugin Instance object.
This results in destruction of the ScriptableObject and then javascript is
re-entered via ExecuteScript. This should never happen outside tests because
the garbage collector won't be run synchronously. Instead of running
ExecuteScript, which just set a variable in the Instance object to verify
that the ScriptableObject was correctly destroyed.

BUG=351636

Review URL: https://codereview.chromium.org/472693002

Cr-Commit-Position: refs/heads/master@{#291636}

1 files changed, 2 insertions, 1 deletions

diff --git a/content/renderer/pepper/pepper_try_catch.h b/content/renderer/pepper/pepper_try_catch.h
index f82c0c3..6b76717 100644
--- a/content/renderer/pepper/pepper_try_catch.h
+++ b/content/renderer/pepper/pepper_try_catch.h
@@ -6,6 +6,7 @@
 #define CONTENT_RENDERER_PEPPER_PEPPER_TRY_CATCH_H_
 
 #include "base/basictypes.h"
+#include "content/common/content_export.h"
 #include "ppapi/c/pp_var.h"
 #include "ppapi/shared_impl/scoped_pp_var.h"
 #include "v8/include/v8.h"
@@ -15,7 +16,7 @@ namespace content {
 class PepperPluginInstanceImpl;
 
 // Base class for scripting TryCatch helpers.
-class PepperTryCatch {
+class CONTENT_EXPORT PepperTryCatch {
  public:
   PepperTryCatch(PepperPluginInstanceImpl* instance,
                  bool convert_objects);