Initialize V8 outside of PDFium.

This is similar to how we initialize ICU for V8 inside PDFium.

BUG=455399
R=wfh@chromium.org

Review URL: https://codereview.chromium.org/897973002
diff --git a/fpdfsdk/include/javascript/IJavaScript.h b/fpdfsdk/include/javascript/IJavaScript.h
index 8ea9a4e..9ae0329 100644
--- a/fpdfsdk/include/javascript/IJavaScript.h
+++ b/fpdfsdk/include/javascript/IJavaScript.h
@@ -7,10 +7,6 @@
 #ifndef _IJAVASCRIPT_H_
 #define _IJAVASCRIPT_H_
 
-namespace v8 {
-class Platform;
-}
-
 class IFXJS_Context
 {
 public:
@@ -99,7 +95,7 @@
 class CJS_RuntimeFactory
 {
 public:
-	CJS_RuntimeFactory():m_bInit(FALSE),m_nRef(0),m_pGlobalData(NULL),m_nGlobalDataCount(0),m_platform(NULL) {}
+	CJS_RuntimeFactory():m_bInit(FALSE),m_nRef(0),m_pGlobalData(NULL),m_nGlobalDataCount(0) {}
 	~CJS_RuntimeFactory();
 	IFXJS_Runtime*					NewJSRuntime(CPDFDoc_Environment* pApp);
 	void							DeleteJSRuntime(IFXJS_Runtime* pRuntime);
@@ -113,7 +109,6 @@
 	int m_nRef;
 	CJS_GlobalData*					m_pGlobalData;
 	FX_INT32						m_nGlobalDataCount;
-        v8::Platform*						m_platform;
 };
 
 #endif //_IJAVASCRIPT_H_
diff --git a/fpdfsdk/src/javascript/JS_Runtime.cpp b/fpdfsdk/src/javascript/JS_Runtime.cpp
index 52e3ae8..30d1cc3 100644
--- a/fpdfsdk/src/javascript/JS_Runtime.cpp
+++ b/fpdfsdk/src/javascript/JS_Runtime.cpp
@@ -27,8 +27,6 @@
 #include "../../include/javascript/global.h"
 #include "../../include/javascript/console.h"
 
-#include <libplatform/libplatform.h>
-
 CJS_RuntimeFactory::~CJS_RuntimeFactory()
 {
 }
@@ -38,10 +36,6 @@
 	if (!m_bInit)
 	{
 		JS_Initial();
-                m_platform = v8::platform::CreateDefaultPlatform();
-                v8::V8::InitializePlatform(m_platform);
-                v8::V8::Initialize();
-		
 		m_bInit = TRUE;
 	}
 	return new CJS_Runtime(pApp);
@@ -60,9 +54,6 @@
 		{
 			JS_Release();
 			ReleaseGlobalData();
-                        v8::V8::ShutdownPlatform();
-                        delete m_platform;
-                        m_platform = NULL;
 			m_bInit = FALSE;
 		}
 	}
diff --git a/pdfium.gyp b/pdfium.gyp
index df85452..c23059d 100644
--- a/pdfium.gyp
+++ b/pdfium.gyp
@@ -720,13 +720,12 @@
     {
       'target_name': 'javascript',
       'type': 'static_library',
-        'include_dirs': [
-          '<(DEPTH)/v8',
-          '<(DEPTH)/v8/include',
-        ],
+      'include_dirs': [
+        '<(DEPTH)/v8',
+        '<(DEPTH)/v8/include',
+      ],
       'dependencies': [
         '<(DEPTH)/v8/tools/gyp/v8.gyp:v8',
-        '<(DEPTH)/v8/tools/gyp/v8.gyp:v8_libplatform',
       ],
       'export_dependent_settings': [
         '<(DEPTH)/v8/tools/gyp/v8.gyp:v8',
diff --git a/samples/pdfium_test.cc b/samples/pdfium_test.cc
index debe033..7ba85ef 100644
--- a/samples/pdfium_test.cc
+++ b/samples/pdfium_test.cc
@@ -20,6 +20,7 @@
 #include "../fpdfsdk/include/fpdfview.h"
 #include "../core/include/fxcrt/fx_system.h"
 #include "v8/include/v8.h"
+#include "v8/include/libplatform/libplatform.h"
 
 #ifdef _WIN32
 #define snprintf _snprintf
@@ -497,6 +498,9 @@
   }
 
   v8::V8::InitializeICU();
+  v8::Platform* platform = v8::platform::CreateDefaultPlatform();
+  v8::V8::InitializePlatform(platform);
+  v8::V8::Initialize();
 
 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
   v8::StartupData natives;
@@ -530,6 +534,8 @@
   }
 
   FPDF_DestroyLibrary();
+  v8::V8::ShutdownPlatform();
+  delete platform;
 
   return 0;
 }
diff --git a/samples/samples.gyp b/samples/samples.gyp
index 0c8ee93..607a5b9 100644
--- a/samples/samples.gyp
+++ b/samples/samples.gyp
@@ -7,8 +7,13 @@
     'type': 'executable',
     'dependencies': [
       '../pdfium.gyp:pdfium',
+      '<(DEPTH)/v8/tools/gyp/v8.gyp:v8_libplatform',
     ],
-    'include_dirs': ['<(DEPTH)'],
+    'include_dirs': [
+      '<(DEPTH)',
+      '<(DEPTH)/v8',
+      '<(DEPTH)/v8/include',
+    ],
   },
   'targets': [
     {