Remove duplicate profile getter in ExtensionServiceTestBase subclasses.

ExtensionServiceTestBase already provides identical profile()
getter.

Bug: None
Change-Id: Id0f85b378a0cdf6986fbc50ec1d9d15cb038996c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2046050Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Commit-Queue: Istiaque Ahmed <lazyboy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#746967}

chrome/browser/extensions/api/declarative_content/content_action_unittest.cc

@@ -60,7 +60,6 @@ class RequestContentScriptTest : public ExtensionServiceTestBase {
     base::RunLoop().RunUntilIdle();
   }
 
-  Profile* profile() { return profile_.get(); }
   const Extension* extension() { return extension_.get(); }
 
  private:

chrome/browser/extensions/extension_error_controller_unittest.cc

@@ -109,8 +109,6 @@ class ExtensionErrorControllerUnitTest : public ExtensionServiceTestBase {
 
   // Return the ExtensionPrefs associated with the test.
   ExtensionPrefs* GetPrefs();
-
-  Profile* profile() { return profile_.get(); }
 };
 
 void ExtensionErrorControllerUnitTest::SetUp() {