Use the correct v8 context for conversions when calling into the plugin from JS

content/renderer/pepper/pepper_try_catch.h

Index: content/renderer/pepper/pepper_try_catch.h
diff --git a/content/renderer/pepper/pepper_try_catch.h b/content/renderer/pepper/pepper_try_catch.h
index dba90aa780a8be427c47900f42ab5af304a4e9a3..4b46fdbd9cab6a1ea09e614ea4593a267100ae88 100644
--- a/content/renderer/pepper/pepper_try_catch.h
+++ b/content/renderer/pepper/pepper_try_catch.h
@@ -25,8 +25,8 @@ class CONTENT_EXPORT PepperTryCatch {
 
   virtual void SetException(const char* message) = 0;
   virtual bool HasException() = 0;
-  // Gets the plugin context. Virtual so it can be overriden for testing.
-  virtual v8::Handle<v8::Context> GetContext();
+  // Gets the context to execute scripts in.
+  virtual v8::Handle<v8::Context> GetContext() = 0;
 
   // Convenience functions for doing conversions to/from V8 values and sets an
   // exception if there is an error in the conversion.
@@ -57,6 +57,7 @@ class PepperTryCatchV8 : public PepperTryCatch {
   // PepperTryCatch
   virtual void SetException(const char* message) OVERRIDE;
   virtual bool HasException() OVERRIDE;
+  virtual v8::Handle<v8::Context> GetContext() OVERRIDE;
 
  private:
   PP_Var exception_;
@@ -77,6 +78,7 @@ class PepperTryCatchVar : public PepperTryCatch {
   // PepperTryCatch
   virtual void SetException(const char* message) OVERRIDE;
   virtual bool HasException() OVERRIDE;
+  virtual v8::Handle<v8::Context> GetContext() OVERRIDE;
 
  private:
   // Code which uses PepperTryCatchVar doesn't typically have a HandleScope,