Reapplies all the IPC system work (reverts the revert r56272).

chrome/common/webkit_param_traits.h

Index: chrome/common/webkit_param_traits.h
diff --git a/chrome/common/webkit_param_traits.h b/chrome/common/webkit_param_traits.h
index 748c26b11caea359d9d758a6cb5a7ff4c79dd498..63cb10b4247db8c91f30950d40f29d900f5ae65e 100644
--- a/chrome/common/webkit_param_traits.h
+++ b/chrome/common/webkit_param_traits.h
@@ -26,80 +26,38 @@
 
 #include "ipc/ipc_message_utils.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebCache.h"
-#include "third_party/WebKit/WebKit/chromium/public/WebCompositionUnderline.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebConsoleMessage.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebContextMenuData.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebDragOperation.h"
-#include "third_party/WebKit/WebKit/chromium/public/WebFindOptions.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebInputEvent.h"
-#include "third_party/WebKit/WebKit/chromium/public/WebMediaPlayerAction.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebPopupType.h"
-#include "third_party/WebKit/WebKit/chromium/public/WebScreenInfo.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebTextDirection.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebTextInputType.h"
 
+namespace WebKit {
+struct WebCompositionUnderline;
+struct WebFindOptions;
+struct WebMediaPlayerAction;
+struct WebRect;
+struct WebScreenInfo;
+}
+
 namespace IPC {
 
 template <>
 struct ParamTraits<WebKit::WebRect> {
   typedef WebKit::WebRect param_type;
-  static void Write(Message* m, const param_type& p) {
-    WriteParam(m, p.x);
-    WriteParam(m, p.y);
-    WriteParam(m, p.width);
-    WriteParam(m, p.height);
-  }
-  static bool Read(const Message* m, void** iter, param_type* p) {
-    return
-      ReadParam(m, iter, &p->x) &&
-      ReadParam(m, iter, &p->y) &&
-      ReadParam(m, iter, &p->width) &&
-      ReadParam(m, iter, &p->height);
-  }
-  static void Log(const param_type& p, std::wstring* l) {
-    l->append(L"(");
-    LogParam(p.x, l);
-    l->append(L", ");
-    LogParam(p.y, l);
-    l->append(L", ");
-    LogParam(p.width, l);
-    l->append(L", ");
-    LogParam(p.height, l);
-    l->append(L")");
-  }
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::wstring* l);
 };
 
 template <>
 struct ParamTraits<WebKit::WebScreenInfo> {
   typedef WebKit::WebScreenInfo param_type;
-  static void Write(Message* m, const param_type& p) {
-    WriteParam(m, p.depth);
-    WriteParam(m, p.depthPerComponent);
-    WriteParam(m, p.isMonochrome);
-    WriteParam(m, p.rect);
-    WriteParam(m, p.availableRect);
-  }
-  static bool Read(const Message* m, void** iter, param_type* p) {
-    return
-      ReadParam(m, iter, &p->depth) &&
-      ReadParam(m, iter, &p->depthPerComponent) &&
-      ReadParam(m, iter, &p->isMonochrome) &&
-      ReadParam(m, iter, &p->rect) &&
-      ReadParam(m, iter, &p->availableRect);
-  }
-  static void Log(const param_type& p, std::wstring* l) {
-    l->append(L"(");
-    LogParam(p.depth, l);
-    l->append(L", ");
-    LogParam(p.depthPerComponent, l);
-    l->append(L", ");
-    LogParam(p.isMonochrome, l);
-    l->append(L", ");
-    LogParam(p.rect, l);
-    l->append(L", ");
-    LogParam(p.availableRect, l);
-    l->append(L")");
-  }
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::wstring* l);
 };
 
 template <>
@@ -141,26 +99,9 @@ struct ParamTraits<WebKit::WebPopupType> {
 template <>
 struct ParamTraits<WebKit::WebFindOptions> {
   typedef WebKit::WebFindOptions param_type;
-  static void Write(Message* m, const param_type& p) {
-    WriteParam(m, p.forward);
-    WriteParam(m, p.matchCase);
-    WriteParam(m, p.findNext);
-  }
-  static bool Read(const Message* m, void** iter, param_type* p) {
-    return
-      ReadParam(m, iter, &p->forward) &&
-      ReadParam(m, iter, &p->matchCase) &&
-      ReadParam(m, iter, &p->findNext);
-  }
-  static void Log(const param_type& p, std::wstring* l) {
-    l->append(L"(");
-    LogParam(p.forward, l);
-    l->append(L", ");
-    LogParam(p.matchCase, l);
-    l->append(L", ");
-    LogParam(p.findNext, l);
-    l->append(L")");
-  }
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::wstring* l);
 };
 
 template <>
@@ -328,37 +269,9 @@ struct ParamTraits<WebKit::WebDragOperation> {
 template <>
 struct ParamTraits<WebKit::WebMediaPlayerAction> {
   typedef WebKit::WebMediaPlayerAction param_type;
-  static void Write(Message* m, const param_type& p) {
-    WriteParam(m, static_cast<int>(p.type));
-    WriteParam(m, p.enable);
-  }
-  static bool Read(const Message* m, void** iter, param_type* r) {
-    int temp;
-    if (!ReadParam(m, iter, &temp))
-      return false;
-    r->type = static_cast<param_type::Type>(temp);
-    return ReadParam(m, iter, &r->enable);
-  }
-  static void Log(const param_type& p, std::wstring* l) {
-    l->append(L"(");
-    switch (p.type) {
-      case WebKit::WebMediaPlayerAction::Play:
-        l->append(L"Play");
-        break;
-      case WebKit::WebMediaPlayerAction::Mute:
-        l->append(L"Mute");
-        break;
-      case WebKit::WebMediaPlayerAction::Loop:
-        l->append(L"Loop");
-        break;
-      default:
-        l->append(L"Unknown");
-        break;
-    }
-    l->append(L", ");
-    LogParam(p.enable, l);
-    l->append(L")");
-  }
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* r);
+  static void Log(const param_type& p, std::wstring* l);
 };
 
 template <>
@@ -378,30 +291,9 @@ template <>
 template <>
 struct ParamTraits<WebKit::WebCompositionUnderline> {
   typedef WebKit::WebCompositionUnderline param_type;
-  static void Write(Message* m, const param_type& p) {
-    WriteParam(m, p.startOffset);
-    WriteParam(m, p.endOffset);
-    WriteParam(m, p.color);
-    WriteParam(m, p.thick);
-  }
-  static bool Read(const Message* m, void** iter, param_type* p) {
-    return
-        ReadParam(m, iter, &p->startOffset) &&
-        ReadParam(m, iter, &p->endOffset) &&
-        ReadParam(m, iter, &p->color) &&
-        ReadParam(m, iter, &p->thick);
-  }
-  static void Log(const param_type& p, std::wstring* l) {
-    l->append(L"(");
-    LogParam(p.startOffset, l);
-    l->append(L",");
-    LogParam(p.endOffset, l);
-    l->append(L":");
-    LogParam(p.color, l);
-    l->append(L":");
-    LogParam(p.thick, l);
-    l->append(L")");
-  }
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::wstring* l);
 };
 
 template <>