Cleanup: Remove more forward declarations in various chrome/browser directories.

chrome/browser/profiles/profile.h

Index: chrome/browser/profiles/profile.h
===================================================================
--- chrome/browser/profiles/profile.h	(revision 110049)
+++ chrome/browser/profiles/profile.h	(working copy)
@@ -28,7 +28,6 @@
 
 namespace fileapi {
 class FileSystemContext;
-class SandboxedFileSystemContext;
 }
 
 namespace history {
@@ -40,10 +39,6 @@
 class SSLConfigService;
 }
 
-namespace speech_input {
-class SpeechRecognizer;
-}
-
 namespace chrome_browser_net {
 class Predictor;
 }
@@ -57,7 +52,6 @@
 class ExtensionEventRouter;
 class ExtensionInfoMap;
 class ExtensionMessageService;
-class ExtensionPrefValueMap;
 class ExtensionProcessManager;
 class ExtensionService;
 class ExtensionSpecialStoragePolicy;
@@ -65,17 +59,12 @@
 class FindBarState;
 class HistoryService;
 class HostContentSettingsMap;
-class NavigationController;
 class NetworkActionPredictor;
 class PasswordStore;
 class PrefService;
-class ProfileSyncFactory;
 class ProfileSyncService;
 class PromoCounter;
-class PromoResourceService;
 class ProtocolHandlerRegistry;
-class SQLitePersistentCookieStore;
-class SSLConfigServiceManager;
 class SpeechInputPreferences;
 class SpellCheckHost;
 class TemplateURLFetcher;
@@ -83,7 +72,6 @@
 class TokenService;
 class UserScriptMaster;
 class UserStyleSheetWatcher;
-class VisitedLinkEventListener;
 class VisitedLinkMaster;
 class WebDataService;
 class WebUI;