Fixes ClipboardRecentContentIOSTest on iOS 10.

components/open_from_clipboard/clipboard_recent_content_ios_unittest.mm

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/open_from_clipboard/clipboard_recent_content_ios.h"
 
+#import <CoreGraphics/CoreGraphics.h>
 #import <UIKit/UIKit.h>
 
 #include <memory>
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 namespace {
 
+UIImage* TestUIImage() {
+  CGRect frame = CGRectMake(0, 0, 1.0, 1.0);
+  UIGraphicsBeginImageContext(frame.size);
+
+  CGContextRef context = UIGraphicsGetCurrentContext();
+  CGContextSetFillColorWithColor(context, [UIColor redColor].CGColor);
+  CGContextFillRect(context, frame);
+
+  UIImage* image = UIGraphicsGetImageFromCurrentImageContext();
+  UIGraphicsEndImageContext();
+
+  return image;
+}
+
 void SetPasteboardImage(UIImage* image) {
   [[UIPasteboard generalPasteboard] setImage:image];
 }
 
 void SetPasteboardContent(const char* data) {
   [[UIPasteboard generalPasteboard]
                setValue:[NSString stringWithUTF8String:data]
       forPasteboardType:@"public.plain-text"];
 }
 const char kUnrecognizedURL[] = "ftp://foo/";
@@ skipping 121 matching lines @@
 TEST_F(ClipboardRecentContentIOSTest, AddingNonStringRemovesCachedString) {
   GURL gurl;
   SetPasteboardContent(kRecognizedURL);
 
   // Test that recent pasteboard data is provided.
   EXPECT_TRUE(clipboard_content_->GetRecentURLFromClipboard(&gurl));
   EXPECT_STREQ(kRecognizedURL, gurl.spec().c_str());
 
   // Overwrite pasteboard with an image.
   base::scoped_nsobject<UIImage> image([[UIImage alloc] init]);
-  SetPasteboardImage(image);
+  SetPasteboardImage(TestUIImage());
 
   // Pasteboard should appear empty.
   EXPECT_FALSE(clipboard_content_->GetRecentURLFromClipboard(&gurl));
 
   // Tests that if URL is added again, pasteboard provides it normally.
   SetPasteboardContent(kRecognizedURL);
   EXPECT_TRUE(clipboard_content_->GetRecentURLFromClipboard(&gurl));
   EXPECT_STREQ(kRecognizedURL, gurl.spec().c_str());
 }