Rename |CRWWebStateObserver webState:navigationItemsPrunedCount:|

To adhere to Coding Guidelines for Cocoa, rename this method to
|webState:didPruneNavigationItemsWithCount:|.

Bug: 
Change-Id: Ibc07ab7012e1490b03e2e5ff814270ce4186ab11
Reviewed-on: https://chromium-review.googlesource.com/531464Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Mike Dougherty <michaeldo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#478822}

ios/web/public/test/fakes/crw_test_web_state_observer.h

@@ -11,7 +11,7 @@
 // Test implementation of CRWWebStateObserver protocol.
 @interface CRWTestWebStateObserver : NSObject<CRWWebStateObserver>
 
-// Arguments passed to |webState:navigationItemsPrunedCount:|.
+// Arguments passed to |webState:didPruneNavigationItemsWithCount:|.
 @property(nonatomic, readonly)
     web::TestNavigationItemsPrunedInfo* navigationItemsPrunedInfo;
 // Arguments passed to |webState:didStartNavigation:|.

ios/web/public/test/fakes/crw_test_web_state_observer.mm

@@ -23,7 +23,7 @@ TestUpdateFaviconUrlCandidatesInfo::~TestUpdateFaviconUrlCandidatesInfo() =
 }
 
 @implementation CRWTestWebStateObserver {
-  // Arguments passed to |webState:navigationItemsPrunedCount:|.
+  // Arguments passed to |webState:didPruneNavigationItemsWithCount:|.
   std::unique_ptr<web::TestNavigationItemsPrunedInfo>
       _navigationItemsPrunedInfo;
   // Arguments passed to |webState:didStartNavigation:|.
@@ -137,7 +137,7 @@ TestUpdateFaviconUrlCandidatesInfo::~TestUpdateFaviconUrlCandidatesInfo() =
 #pragma mark CRWWebStateObserver methods -
 
 - (void)webState:(web::WebState*)webState
-    navigationItemsPrunedCount:(size_t)pruned_item_count {
+    didPruneNavigationItemsWithCount:(size_t)pruned_item_count {
   _navigationItemsPrunedInfo =
       base::MakeUnique<web::TestNavigationItemsPrunedInfo>();
   _navigationItemsPrunedInfo->web_state = webState;

ios/web/public/web_state/web_state_observer_bridge.h

@@ -20,7 +20,7 @@
 
 // Invoked by WebStateObserverBridge::NavigationItemsPruned.
 - (void)webState:(web::WebState*)webState
-    navigationItemsPrunedCount:(size_t)pruned_item_count;
+    didPruneNavigationItemsWithCount:(size_t)pruned_item_count;
 
 // Invoked by WebStateObserverBridge::NavigationItemCommitted.
 - (void)webState:(web::WebState*)webState

ios/web/web_state/web_state_observer_bridge.mm

@@ -15,10 +15,10 @@ WebStateObserverBridge::~WebStateObserverBridge() {
 }
 
 void WebStateObserverBridge::NavigationItemsPruned(size_t pruned_item_count) {
-  SEL selector = @selector(webState:navigationItemsPrunedCount:);
+  SEL selector = @selector(webState:didPruneNavigationItemsWithCount:);
   if ([observer_ respondsToSelector:selector]) {
     [observer_ webState:web_state()
-        navigationItemsPrunedCount:pruned_item_count];
+        didPruneNavigationItemsWithCount:pruned_item_count];
   }
 }
 

ios/web/web_state/web_state_observer_bridge_unittest.mm

@@ -38,7 +38,7 @@ class WebStateObserverBridgeTest : public PlatformTest {
   scoped_refptr<net::HttpResponseHeaders> response_headers_;
 };
 
-// Tests |webState:navigationItemsPrunedCount:| forwarding.
+// Tests |webState:didPruneNavigationItemsWithCount:| forwarding.
 TEST_F(WebStateObserverBridgeTest, NavigationItemsPruned) {
   ASSERT_FALSE([observer_ navigationItemsPrunedInfo]);