Remove dead declarations for a nonexistent class.

TestingAutomationProvider is dead, Jim.

BUG=154997
TBR=jam,sky

Review URL: https://codereview.chromium.org/660353002

Cr-Commit-Position: refs/heads/master@{#300200}

base/threading/thread_restrictions.h

@@ -19,7 +19,6 @@ class BrowserProcessImpl;
 class HistogramSynchronizer;
 class NativeBackendKWallet;
 class ScopedAllowWaitForLegacyWebViewApi;
-class TestingAutomationProvider;
 
 namespace cc {
 class CompletionEvent;
@@ -177,7 +176,6 @@ class BASE_EXPORT ThreadRestrictions {
   friend class content::ScopedAllowWaitForAndroidLayoutTests;
   friend class ::HistogramSynchronizer;
   friend class ::ScopedAllowWaitForLegacyWebViewApi;
-  friend class ::TestingAutomationProvider;
   friend class cc::CompletionEvent;
   friend class mojo::common::WatcherThreadManager;
   friend class remoting::AutoThread;

chrome/browser/ui/browser.h

@@ -772,7 +772,6 @@ class Browser : public TabStripModelObserver,
   //             the LocationBarView's edit.
   friend class AutomationProvider;
   friend class BrowserProxy;
-  friend class TestingAutomationProvider;
 
   // Returns the StatusBubble from the current toolbar. It is possible for
   // this to return NULL if called before the toolbar has initialized.

components/autofill/core/browser/personal_data_manager.h

@@ -236,7 +236,6 @@ class PersonalDataManager : public KeyedService,
   friend class PersonalDataManagerTest;
   friend class ProfileSyncServiceAutofillTest;
   friend class ::RemoveAutofillTester;
-  friend class TestingAutomationProvider;
   friend struct base::DefaultDeleter<PersonalDataManager>;
   friend void autofill_helper::SetProfiles(
       int, std::vector<autofill::AutofillProfile>*);