Moving GraphicsContext and dependencies from core to platform.

Source/platform/graphics/filters/FilterOperation.h

Index: Source/platform/graphics/filters/FilterOperation.h
diff --git a/Source/core/platform/graphics/filters/FilterOperation.h b/Source/platform/graphics/filters/FilterOperation.h
similarity index 94%
rename from Source/core/platform/graphics/filters/FilterOperation.h
rename to Source/platform/graphics/filters/FilterOperation.h
index 489bfe6a6b7bdc25b790caaaa5eadce8b581e73b..ddc69dd3ddefb8dddc1494b123c1396217a1d28f 100644
--- a/Source/core/platform/graphics/filters/FilterOperation.h
+++ b/Source/platform/graphics/filters/FilterOperation.h
@@ -26,10 +26,11 @@
 #ifndef FilterOperation_h
 #define FilterOperation_h
 
-#include "core/platform/graphics/filters/Filter.h"
-#include "core/platform/graphics/filters/ReferenceFilter.h"
 #include "platform/Length.h"
+#include "platform/PlatformExport.h"
 #include "platform/graphics/Color.h"
+#include "platform/graphics/filters/Filter.h"
+#include "platform/graphics/filters/ReferenceFilter.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefCounted.h"
@@ -39,7 +40,7 @@ namespace WebCore {
 
 // CSS Filters
 
-class FilterOperation : public RefCounted<FilterOperation> {
+class PLATFORM_EXPORT FilterOperation : public RefCounted<FilterOperation> {
 public:
     enum OperationType {
         REFERENCE, // url(#somefilter)
@@ -112,7 +113,7 @@ private:
 #define DEFINE_FILTER_OPERATION_TYPE_CASTS(thisType, operationType) \
     DEFINE_TYPE_CASTS(thisType, FilterOperation, op, op->type() == FilterOperation::operationType, op.type() == FilterOperation::operationType);
 
-class ReferenceFilterOperation : public FilterOperation {
+class PLATFORM_EXPORT ReferenceFilterOperation : public FilterOperation {
 public:
     static PassRefPtr<ReferenceFilterOperation> create(const String& url, const String& fragment)
     {
@@ -159,7 +160,7 @@ DEFINE_FILTER_OPERATION_TYPE_CASTS(ReferenceFilterOperation, REFERENCE);
 
 // GRAYSCALE, SEPIA, SATURATE and HUE_ROTATE are variations on a basic color matrix effect.
 // For HUE_ROTATE, the angle of rotation is stored in m_amount.
-class BasicColorMatrixFilterOperation : public FilterOperation {
+class PLATFORM_EXPORT BasicColorMatrixFilterOperation : public FilterOperation {
 public:
     static PassRefPtr<BasicColorMatrixFilterOperation> create(double amount, OperationType type)
     {
@@ -197,7 +198,7 @@ inline bool isBasicColorMatrixFilterOperation(const FilterOperation& operation)
 DEFINE_TYPE_CASTS(BasicColorMatrixFilterOperation, FilterOperation, op, isBasicColorMatrixFilterOperation(*op), isBasicColorMatrixFilterOperation(op));
 
 // INVERT, BRIGHTNESS, CONTRAST and OPACITY are variations on a basic component transfer effect.
-class BasicComponentTransferFilterOperation : public FilterOperation {
+class PLATFORM_EXPORT BasicComponentTransferFilterOperation : public FilterOperation {
 public:
     static PassRefPtr<BasicComponentTransferFilterOperation> create(double amount, OperationType type)
     {
@@ -236,7 +237,7 @@ inline bool isBasicComponentTransferFilterOperation(const FilterOperation& opera
 
 DEFINE_TYPE_CASTS(BasicComponentTransferFilterOperation, FilterOperation, op, isBasicComponentTransferFilterOperation(*op), isBasicComponentTransferFilterOperation(op));
 
-class BlurFilterOperation : public FilterOperation {
+class PLATFORM_EXPORT BlurFilterOperation : public FilterOperation {
 public:
     static PassRefPtr<BlurFilterOperation> create(Length stdDeviation)
     {
@@ -270,7 +271,7 @@ private:
 
 DEFINE_FILTER_OPERATION_TYPE_CASTS(BlurFilterOperation, BLUR);
 
-class DropShadowFilterOperation : public FilterOperation {
+class PLATFORM_EXPORT DropShadowFilterOperation : public FilterOperation {
 public:
     static PassRefPtr<DropShadowFilterOperation> create(const IntPoint& location, int stdDeviation, Color color)
     {