Consolidated all CWVWebView test helpers inside web_view_test_util file.

ios/web_view/test/chrome_web_view_test.h

Index: ios/web_view/test/chrome_web_view_test.h
diff --git a/ios/web_view/test/chrome_web_view_test.h b/ios/web_view/test/chrome_web_view_test.h
index 92505c53d3d835de0b7513eacc86a051130bb928..d6e735340bcbf9537f38652b359ef34177a9ec85 100644
--- a/ios/web_view/test/chrome_web_view_test.h
+++ b/ios/web_view/test/chrome_web_view_test.h
@@ -42,13 +42,6 @@ class ChromeWebViewTest : public PlatformTest {
   GURL GetUrlForPageWithTitleAndBody(const std::string& title,
                                      const std::string& body);
 
-  // Loads |URL| in |web_view| and waits until the load completes. Asserts if
-  // loading does not complete.
-  void LoadUrl(CWVWebView* web_view, NSURL* url);
-
-  // Waits until |web_view| stops loading. Asserts if loading does not complete.
-  void WaitForPageLoadCompletion(CWVWebView* web_view);
-
   // PlatformTest methods.
   void SetUp() override;