[ios] Remove dead snapshot size code

This CL simply removes unused/dead code from snapshots.

Change-Id: I23d7eebea71d1db42057b5b06750d76fc2081bd0
Reviewed-on: https://chromium-review.googlesource.com/c/1392265Reviewed-by: edchin <edchin@chromium.org>
Reviewed-by: Justin Cohen <justincohen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619566}

ios/chrome/browser/snapshots/snapshot_generator.h

@@ -7,7 +7,6 @@
 
 #import <UIKit/UIKit.h>
 
-@class SnapshotOverlay;
 @protocol SnapshotGeneratorDelegate;
 
 namespace web {
@@ -25,11 +24,6 @@ class WebState;
 
 - (instancetype)init NS_UNAVAILABLE;
 
-// Returns the size the snapshot for the current page would have if it
-// was regenerated. If capturing the snapshot is not possible, returns
-// CGSizeZero.
-- (CGSize)snapshotSize;
-
 // Gets a color snapshot for the current page, calling |callback| once it has
 // been retrieved. Invokes |callback| with nil if a snapshot does not exist.
 - (void)retrieveSnapshot:(void (^)(UIImage*))callback;

ios/chrome/browser/snapshots/snapshot_generator.mm

@@ -15,14 +15,11 @@
 #include "base/logging.h"
 #include "base/task/post_task.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
-#import "ios/chrome/browser/ntp/new_tab_page_tab_helper.h"
 #import "ios/chrome/browser/snapshots/snapshot_cache.h"
 #import "ios/chrome/browser/snapshots/snapshot_cache_factory.h"
 #import "ios/chrome/browser/snapshots/snapshot_generator_delegate.h"
 #import "ios/chrome/browser/snapshots/snapshot_overlay.h"
 #import "ios/chrome/browser/ui/util/uikit_ui_util.h"
-#include "ios/web/public/features.h"
-#import "ios/web/public/features.h"
 #import "ios/web/public/web_state/web_state.h"
 #import "ios/web/public/web_state/web_state_observer_bridge.h"
 #include "ios/web/public/web_task_traits.h"
@@ -81,10 +78,6 @@ BOOL ViewHierarchyContainsWKWebView(UIView* view) {
   }
 }
 
-- (CGSize)snapshotSize {
-  return [self snapshotFrame].size;
-}
-
 - (void)retrieveSnapshot:(void (^)(UIImage*))callback {
   DCHECK(callback);
   if (self.snapshotCache) {

ios/chrome/browser/snapshots/snapshot_tab_helper.h

@@ -5,21 +5,22 @@
 #ifndef IOS_CHROME_BROWSER_SNAPSHOTS_SNAPSHOT_TAB_HELPER_H_
 #define IOS_CHROME_BROWSER_SNAPSHOTS_SNAPSHOT_TAB_HELPER_H_
 
-#include <memory>
-
 #import <UIKit/UIKit.h>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/scoped_observer.h"
 #include "components/infobars/core/infobar_manager.h"
-#import "ios/web/public/web_state/web_state.h"
 #include "ios/web/public/web_state/web_state_observer.h"
 #import "ios/web/public/web_state/web_state_user_data.h"
 
 @class SnapshotGenerator;
 @protocol SnapshotGeneratorDelegate;
 
+namespace web {
+class WebState;
+}
+
 // SnapshotTabHelper allows capturing and retrival for web page snapshots.
 class SnapshotTabHelper : public infobars::InfoBarManager::Observer,
                           public web::WebStateObserver,
@@ -36,11 +37,6 @@ class SnapshotTabHelper : public infobars::InfoBarManager::Observer,
   // results in failures. The delegate is not owned by the tab helper.
   void SetDelegate(id<SnapshotGeneratorDelegate> delegate);
 
-  // Returns the size the snapshot for the current page would have if it
-  // was regenerated. If capturing the snapshot is not possible, returns
-  // CGSizeZero.
-  CGSize GetSnapshotSize() const;
-
   // Retrieves a color snapshot for the current page, invoking |callback|
   // with the image. The callback may be called synchronously is there is
   // a cached snapshot available in memory, otherwise it will be invoked

ios/chrome/browser/snapshots/snapshot_tab_helper.mm

@@ -11,6 +11,7 @@
 #include "ios/chrome/browser/infobars/infobar_manager_impl.h"
 #import "ios/chrome/browser/snapshots/snapshot_generator.h"
 #include "ios/chrome/browser/ui/util/ui_util.h"
+#import "ios/web/public/web_state/web_state.h"
 #include "ios/web/public/web_task_traits.h"
 #include "ios/web/public/web_thread.h"
 
@@ -55,10 +56,6 @@ void SnapshotTabHelper::SetDelegate(id<SnapshotGeneratorDelegate> delegate) {
   snapshot_generator_.delegate = delegate;
 }
 
-CGSize SnapshotTabHelper::GetSnapshotSize() const {
-  return [snapshot_generator_ snapshotSize];
-}
-
 void SnapshotTabHelper::RetrieveColorSnapshot(void (^callback)(UIImage*)) {
   [snapshot_generator_ retrieveSnapshot:callback];
 }