Move FindPasteboard to ui/base/cocoa since it's used by two modules (content+chrome).

content/browser/find_pasteboard.mm

Index: content/browser/find_pasteboard.mm
===================================================================
--- content/browser/find_pasteboard.mm	(revision 125450)
+++ content/browser/find_pasteboard.mm	(working copy)
@@ -1,82 +0,0 @@
-// Copyright (c) 2009 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.
-
-#import "content/browser/find_pasteboard.h"
-
-#include "base/logging.h"
-#include "base/sys_string_conversions.h"
-
-NSString* kFindPasteboardChangedNotification =
-    @"kFindPasteboardChangedNotification_Chrome";
-
-@implementation FindPasteboard
-
-+ (FindPasteboard*)sharedInstance {
-  static FindPasteboard* instance = nil;
-  if (!instance) {
-    instance = [[FindPasteboard alloc] init];
-  }
-  return instance;
-}
-
-- (id)init {
-  if ((self = [super init])) {
-    findText_.reset([[NSString alloc] init]);
-
-    // Check if the text in the findboard has changed on app activate.
-    [[NSNotificationCenter defaultCenter]
-        addObserver:self
-           selector:@selector(loadTextFromPasteboard:)
-               name:NSApplicationDidBecomeActiveNotification
-             object:nil];
-    [self loadTextFromPasteboard:nil];
-  }
-  return self;
-}
-
-- (void)dealloc {
-  // Since this is a singleton, this should only be executed in test code.
-  [[NSNotificationCenter defaultCenter] removeObserver:self];
-  [super dealloc];
-}
-
-- (NSPasteboard*)findPboard {
-  return [NSPasteboard pasteboardWithName:NSFindPboard];
-}
-
-- (void)loadTextFromPasteboard:(NSNotification*)notification {
-  NSPasteboard* findPboard = [self findPboard];
-  if ([[findPboard types] containsObject:NSStringPboardType])
-    [self setFindText:[findPboard stringForType:NSStringPboardType]];
-}
-
-- (NSString*)findText {
-  return findText_;
-}
-
-- (void)setFindText:(NSString*)newText {
-  DCHECK(newText);
-  if (!newText)
-    return;
-
-  DCHECK([NSThread isMainThread]);
-
-  BOOL needToSendNotification = ![findText_.get() isEqualToString:newText];
-  if (needToSendNotification) {
-    findText_.reset([newText copy]);
-    NSPasteboard* findPboard = [self findPboard];
-    [findPboard declareTypes:[NSArray arrayWithObject:NSStringPboardType]
-                       owner:nil];
-    [findPboard setString:findText_.get() forType:NSStringPboardType];
-    [[NSNotificationCenter defaultCenter]
-        postNotificationName:kFindPasteboardChangedNotification
-                      object:self];
-  }
-}
-
-@end
-
-string16 GetFindPboardText() {
-  return base::SysNSStringToUTF16([[FindPasteboard sharedInstance] findText]);
-}