WebView: Cleanup class/struct forward declarations

Remove useless class and struct forward declarations, and add
missing ones in android_webview header files.

BUG=662195

Review-Url: https://codereview.chromium.org/2540163002
Cr-Commit-Position: refs/heads/master@{#435590}

android_webview/browser/aw_browser_main_parts.h

@@ -17,7 +17,6 @@ class MessageLoop;
 
 namespace android_webview {
 
-class AwBrowserContext;
 class AwContentBrowserClient;
 
 class AwBrowserMainParts : public content::BrowserMainParts {

android_webview/browser/aw_contents_io_thread_client.h

@@ -12,8 +12,6 @@
 
 #include "base/callback_forward.h"
 
-class GURL;
-
 namespace net {
 class HttpResponseHeaders;
 class URLRequest;

android_webview/browser/aw_metrics_service_client.h

@@ -21,7 +21,6 @@ class FilePath;
 }
 
 namespace metrics {
-struct ClientInfo;
 class MetricsStateManager;
 }
 

android_webview/browser/browser_view_renderer_client.h

@@ -15,7 +15,6 @@ class TouchHandleDrawable;
 }
 
 namespace android_webview {
-struct ParentCompositorDrawConstraints;
 
 class BrowserViewRendererClient {
  public:

android_webview/browser/hardware_renderer.h

@@ -18,10 +18,8 @@
 struct AwDrawGLInfo;
 
 namespace cc {
-class Display;
 class SurfaceFactory;
 class SurfaceIdAllocator;
-class SurfaceManager;
 }
 
 namespace android_webview {

android_webview/browser/net/aw_network_delegate.h

@@ -9,7 +9,6 @@
 #include "net/base/network_delegate_impl.h"
 
 namespace net {
-class ProxyInfo;
 class URLRequest;
 }
 

android_webview/browser/net/aw_url_request_context_getter.h

@@ -31,8 +31,6 @@ class URLRequestJobFactory;
 
 namespace android_webview {
 
-class AwNetworkDelegate;
-
 class AwURLRequestContextGetter : public net::URLRequestContextGetter {
  public:
   AwURLRequestContextGetter(

android_webview/browser/net/aw_web_resource_response.h

@@ -13,7 +13,6 @@
 
 namespace net {
 class HttpResponseHeaders;
-class NetworkDelegate;
 class URLRequest;
 }
 

android_webview/browser/net/init_native_callback.h

@@ -19,7 +19,6 @@ class URLRequestInterceptor;
 }  // namespace net
 
 namespace android_webview {
-class AwBrowserContext;
 
 // Gets the TaskRunner that the CookieStore must be called on.
 scoped_refptr<base::SingleThreadTaskRunner> GetCookieStoreTaskRunner();

android_webview/browser/renderer_host/aw_render_view_host_ext.h

@@ -16,8 +16,6 @@
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/geometry/size_f.h"
 
-class GURL;
-
 namespace content {
 struct FrameNavigateParams;
 struct LoadCommittedDetails;

android_webview/browser/scoped_app_gl_state_restore.h

@@ -7,10 +7,6 @@
 
 #include "base/macros.h"
 
-namespace gl {
-class GLContext;
-}
-
 namespace android_webview {
 
 namespace internal {

android_webview/browser/surfaces_instance.h

@@ -29,9 +29,7 @@ class Transform;
 
 namespace android_webview {
 
-class AwGLSurface;
 class ParentOutputSurface;
-class ScopedAppGLStateRestore;
 
 class SurfacesInstance : public base::RefCounted<SurfacesInstance>,
                          public cc::DisplayClient,

android_webview/browser/test/rendering_test.h

@@ -39,8 +39,6 @@ class BrowserViewRenderer;
 class CompositorFrameConsumer;
 class CompositorFrameProducer;
 class FakeWindow;
-class RenderThreadManager;
-struct ParentCompositorDrawConstraints;
 
 class RenderingTest : public testing::Test,
                       public BrowserViewRendererClient,

android_webview/native/android_protocol_handler.h

@@ -10,7 +10,6 @@
 #include "base/android/jni_android.h"
 
 namespace net {
-class URLRequestContext;
 class URLRequestInterceptor;
 }  // namespace net
 

android_webview/native/aw_autofill_client.h

@@ -20,14 +20,11 @@
 #include "ui/android/view_android.h"
 
 namespace autofill {
-class AutofillMetrics;
 class AutofillPopupDelegate;
 class CardUnmaskDelegate;
 class CreditCard;
 class FormStructure;
-class PasswordGenerator;
 class PersonalDataManager;
-struct FormData;
 }
 
 namespace content {

android_webview/native/aw_contents.h

@@ -30,7 +30,6 @@
 
 class SkBitmap;
 class TabContents;
-struct AwDrawGLInfo;
 
 namespace content {
 class WebContents;
@@ -43,7 +42,6 @@ class AwContentsClientBridge;
 class AwGLFunctor;
 class AwPdfExporter;
 class AwWebContentsDelegate;
-class HardwareRenderer;
 class PermissionRequestHandler;
 
 // Native side of java-class of same name.

android_webview/native/aw_contents_io_thread_client_impl.h

@@ -12,10 +12,7 @@
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 
-class GURL;
-
 namespace content {
-class ResourceRequestInfo;
 class WebContents;
 }
 
@@ -25,8 +22,6 @@ class URLRequest;
 
 namespace android_webview {
 
-class AwWebResourceResponse;
-
 class AwContentsIoThreadClientImpl : public AwContentsIoThreadClient {
  public:
    // Called when AwContents is created before there is a Java client.

android_webview/native/aw_quota_manager_bridge_impl.h

@@ -19,8 +19,6 @@
 #include "base/memory/weak_ptr.h"
 #include "base/strings/string16.h"
 
-class GURL;
-
 namespace content {
 class StoragePartition;
 }

android_webview/native/aw_web_contents_view_delegate.h

@@ -15,8 +15,6 @@ class WebContents;
 
 namespace android_webview {
 
-class AwContents;
-
 class AwWebContentsViewDelegate : public content::WebContentsViewDelegate {
  public:
   static content::WebContentsViewDelegate* Create(

android_webview/native/aw_web_preferences_populater_impl.h

@@ -10,8 +10,6 @@
 
 namespace android_webview {
 
-class AwSettings;
-
 class AwWebPreferencesPopulaterImpl : public AwWebPreferencesPopulater {
  public:
   AwWebPreferencesPopulaterImpl();

android_webview/renderer/aw_content_renderer_client.h

@@ -17,7 +17,6 @@
 
 #if BUILDFLAG(ENABLE_SPELLCHECK)
 class SpellCheck;
-class SpellCheckProvider;
 #endif
 
 namespace visitedlink {